Notebook plugin doesn't work in Spyder latest version 6.1.0

[ScentHounds]

Description

What steps will reproduce the problem?

Info from the serverinfo:
A _jupyter_server_extension_points function was not found in jupyterlab_github. Instead, a _jupyter_server_extension_paths function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
'password' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.

Versions

• Spyder version: 6.1.0 (conda)
• Python version: 3.13.9 64-bit
• Qt version: 6.9.1
• PyQt6 version: 6.9.1
• Operating System: Windows-10-10.0.19045-SP0

Dependencies

# Mandatory:
aiohttp >=3.11.2                                                  :  3.12.15 (OK)
asyncssh >=2.14.0,<3.0.0                                          :  2.17.0 (OK)
atomicwrites >=1.2.0                                              :  1.4.0 (OK)
bcrypt >=4.3.0                                                    :  4.3.0 (OK)
chardet >=2.0.0                                                   :  5.2.0 (OK)
cloudpickle >=0.5.0                                               :  3.1.1 (OK)
cookiecutter >=1.6.0                                              :  2.6.0 (OK)
diff_match_patch >=20181111                                       :  20200713 (OK)
github >=2.3.0                                                    :  2.4.0 (OK)
importlib_metadata >=4.6.0                                        :  8.5.0 (OK)
intervaltree >=3.0.2                                              :  3.1.0 (OK)
IPython >=8.15.0,<10.0.0,!=8.17.1,!=9.1.0,!=9.2.0,!=9.3.0,!=9.4.0 :  9.5.0 (OK)
ipython_pygments_lexers >=1.0                                     :  1.1.1 (OK)
jedi >=0.17.2,<0.20.0                                             :  0.19.2 (OK)
jellyfish >=0.7                                                   :  1.1.3 (OK)
jsonschema >=3.2.0                                                :  4.25.0 (OK)
keyring >=17.0.0                                                  :  25.6.0 (OK)
nbconvert >=4.0                                                   :  7.16.6 (OK)
numpydoc >=0.6.0                                                  :  1.9.0 (OK)
packaging >=20.0                                                  :  25.0 (OK)
parso >=0.7.0,<0.9.0                                              :  0.8.4 (OK)
pexpect >=4.4.0                                                   :  4.9.0 (OK)
pickleshare >=0.4                                                 :  0.7.5 (OK)
psutil >=5.3                                                      :  7.0.0 (OK)
pygments >=2.0                                                    :  2.19.1 (OK)
pylint >=3.1,<4                                                   :  3.3.8 (OK)
pylint_venv >=3.0.2                                               :  3.0.3 (OK)
pyls_spyder >=0.4.0                                               :  0.4.0 (OK)
pylsp >=1.13.0,<1.14.0                                            :  1.13.1 (OK)
pylsp_black >=2.0.0,<3.0.0                                        :  2.0.0 (OK)
pylsp_ruff >=2.3.0,<3.0.0                                         :  2.3.0 (OK)
pyuca >=1.2                                                       :  1.2 (OK)
qdarkstyle >=3.2.0,<3.3.0                                         :  3.2.3 (OK)
qstylizer >=0.2.2                                                 :  0.2.2 (OK)
qtawesome >=1.4.0,<1.5.0                                          :  1.4.0 (OK)
qtconsole >=5.7.0,<5.8.0                                          :  5.7.0 (OK)
qtpy >=2.4.0                                                      :  2.4.3 (OK)
rtree >=0.9.7                                                     :  1.4.1 (OK)
sphinx >=0.6.6                                                    :  8.2.3 (OK)
spyder_kernels >=3.1.0,<3.2.0                                     :  3.1.0 (OK)
superqt >=0.6.2,<1.0.0                                            :  0.7.6 (OK)
textdistance >=4.2.0                                              :  4.6.2 (OK)
three_merge >=0.1.1                                               :  0.1.1 (OK)
watchdog >=0.10.3                                                 :  6.0.0 (OK)
yarl >=1.9.4                                                      :  1.18.0 (OK)
zmq >=24.0.0                                                      :  27.1.0 (OK)

# Optional:
cython >=0.21                                                     :  None (NOK)
matplotlib >=3.0.0                                                :  None (NOK)
numpy >=1.7                                                       :  2.3.3 (OK)
pandas >=1.1.1                                                    :  None (NOK)
scipy >=0.17.0                                                    :  1.16.2 (OK)
sympy >=0.7.3                                                     :  None (NOK)

# Spyder plugins:
spyder_line_profiler.spyder.plugin 0.4.2                          :  0.4.2 (OK)
spyder_notebook.notebookplugin 0.6.1                              :  0.6.1 (OK)

Environment

Environment

# packages in environment at C:\Users\Bloodhound\anaconda3\envs\ASP_env:
#
# Name                       Version          Build            Channel
_py-xgboost-mutex            2.0              cpu_2
alibi-detect                 0.12.0           pypi_0           pypi
annotated-types              0.7.0            pypi_0           pypi
arch                         7.2.0            pypi_0           pypi
astral                       3.2              py39hcbf5309_3   conda-forge
asttokens                    3.0.0            py39haa95532_0
attrs                        25.4.0           py39haa95532_0
backcall                     0.2.0            pyhd3eb1b0_1
backports.zoneinfo           0.2.1            py39hcbf5309_9   conda-forge
basemap                      1.4.1            pypi_0           pypi
basemap-data                 1.3.2            pypi_0           pypi
blas                         1.0              mkl
blosc                        1.21.6           h4190f5b_0
bottleneck                   1.4.2            py39hc99e966_0
branca                       0.8.1            py39haa95532_0
brotlicffi                   1.0.9.2          py39h885b0b7_2
bzip2                        1.0.8            h2bbff1b_6
ca-certificates              2025.9.9         haa95532_0
cairo                        1.18.4           he9e932c_0
catalogue                    2.0.10           pypi_0           pypi
certifi                      2025.10.5        py39haa95532_0
cffi                         2.0.0            py39h02ab6af_0
charset-normalizer           3.4.4            py39haa95532_0
choreographer                1.1.1            pypi_0           pypi
click                        8.1.8            py39haa95532_0
click-default-group          1.2.4            pypi_0           pypi
click-plugins                1.1.1            pyhd3eb1b0_0
cligj                        0.7.2            pyhd3eb1b0_0
cloudpickle                  3.1.1            py39haa95532_0
colorama                     0.4.6            py39haa95532_0
comm                         0.2.1            py39haa95532_0
contourpy                    1.2.1            py39h214f63a_1
convertdate                  2.3.2            pyhd3eb1b0_0
cycler                       0.11.0           pyhd3eb1b0_0
cython                       3.1.4            py39h02ab6af_0
debugpy                      1.8.16           py39h885b0b7_0
decorator                    5.2.1            py39haa95532_0
defusedxml                   0.7.1            pypi_0           pypi
deprecated                   1.2.18           py39haa95532_0
descartes                    1.1.0            pyhd3eb1b0_4
dill                         0.3.9            pypi_0           pypi
elementpath                  4.7.0            pypi_0           pypi
et_xmlfile                   2.0.0            py39haa95532_0
exceptiongroup               1.3.0            py39haa95532_0
executing                    2.2.1            py39haa95532_0
expat                        2.7.1            h8ddb27b_0
ezgpx                        0.2.1            pypi_0           pypi
featuretools                 1.31.0           py39haa95532_0
filelock                     3.18.0           pypi_0           pypi
fiona                        1.10.1           py39h885b0b7_1
fitparse                     1.2.0            pypi_0           pypi
folium                       0.20.0           py39haa95532_0
fontconfig                   2.15.0           hd211d86_0
fonttools                    4.60.1           py39h02ab6af_0
fpdf2                        2.8.2            pypi_0           pypi
freeglut                     3.4.0            h8a1e904_1
freetype                     2.13.3           h0620614_0
freexl                       2.0.0            hd7a5696_0
gdal                         3.11.0           py39h30179e3_1
geopandas                    1.0.1            py39haa95532_0
geopandas-base               1.0.1            py39haa95532_0
geos                         3.10.6           he74ecf9_0
geotiff                      1.7.0            hbf7d8e7_4
gmplot                       1.4.1            pypi_0           pypi
gpxpy                        1.6.2            pyhd8ed1ab_1     conda-forge
graphite2                    1.3.14           hd77b12b_1
harfbuzz                     10.2.0           he2f9f60_1
holidays                     0.83             py39haa95532_0
huggingface-hub              0.33.2           pypi_0           pypi
icc_rt                       2022.1.0         h6049295_2
icu                          73.1             h6c2663c_0
idna                         3.7              py39haa95532_0
imageio                      2.37.0           pypi_0           pypi
importlib-metadata           8.5.0            py39haa95532_0
importlib-resources          6.5.2            pyhd3eb1b0_0
importlib_metadata           8.5.0            hd3eb1b0_0
importlib_resources          6.5.2            py39haa95532_0
iniconfig                    2.0.0            pypi_0           pypi
intel-openmp                 2023.1.0         h59b6b97_46320
ipykernel                    6.30.1           py39haa95532_0
ipython                      8.15.0           py39haa95532_0
jedi                         0.19.2           py39haa95532_0
jinja2                       3.1.6            py39haa95532_0
joblib                       1.5.2            py39haa95532_0
jpeg                         9e               h827c3e9_3
jsonschema                   4.25.0           py39haa95532_0
jsonschema-specifications    2023.7.1         py39haa95532_0
jupyter_client               8.6.3            py39haa95532_0
jupyter_core                 5.8.1            py39haa95532_0
kaleido                      1.1.0            pypi_0           pypi
kiwisolver                   1.4.4            py39hd77b12b_0
lazy-loader                  0.4              pypi_0           pypi
lerc                         4.0.0            h5da7b33_0
libarchive                   3.7.7            h9243413_0
libcurl                      8.16.0           h97e0424_0
libdeflate                   1.22             h5bf469e_0
libffi                       3.4.4            hd77b12b_1
libgdal-core                 3.11.0           he0406c8_1
libglib                      2.84.2           h405b238_0
libiconv                     1.16             h2bbff1b_3
libkml                       1.3.0            h63940dd_7
libkrb5                      1.21.3           h885b0b7_4
libpng                       1.6.50           h46444df_0
libpq                        17.6             h652a1e2_0
libsodium                    1.0.20           h83e8143_0
libspatialindex              1.9.3            h6c2663c_0
libspatialite                5.1.0            h6715bb4_2
libssh2                      1.11.1           h2addb87_0
libtiff                      4.7.0            h404307b_0
libwebp-base                 1.3.2            h3d04722_1
libxgboost                   2.1.4            h585ebfc_0
libxml2                      2.13.9           h6201b9f_0
llvmlite                     0.42.0           pypi_0           pypi
logistro                     1.1.0            pypi_0           pypi
lunardate                    0.2.2            pyhff2d567_0     conda-forge
lxml                         5.3.2            pypi_0           pypi
lz4-c                        1.9.4            h2bbff1b_1
mapclassify                  2.5.0            py39haa95532_0
markupsafe                   3.0.2            py39h827c3e9_0
matplotlib                   3.8.4            pypi_0           pypi
matplotlib-base              3.9.2            py39he19b0ae_1
matplotlib-inline            0.1.7            py39haa95532_0
minizip                      4.0.3            hb68bac4_0
missingno                    0.5.2            py39haa95532_0
mkl                          2023.1.0         h6b88ed4_46358
mkl-service                  2.4.0            py39h827c3e9_2
mkl_fft                      1.3.11           py39h827c3e9_0
mkl_random                   1.2.8            py39hc64d2fc_0
mysql-common                 9.3.0            hf582a5b_3
mysql-libs                   9.3.0            hc0ebf12_3
narwhals                     2.7.0            py39haa95532_0
nbformat                     5.10.4           py39haa95532_0
nest-asyncio                 1.6.0            py39haa95532_0
networkx                     3.2.1            py39haa95532_0
numba                        0.59.1           pypi_0           pypi
numexpr                      2.10.1           py39h4cd664f_0
numpy                        2.0.2            py39h055cbcc_0
numpy-base                   2.0.2            py39h65a83cf_0
opencv-python                4.11.0.86        pypi_0           pypi
openpyxl                     3.1.5            py39h827c3e9_1
openssl                      3.0.18           h543e019_0
orjson                       3.11.3           pypi_0           pypi
packaging                    23.2             pypi_0           pypi
palettable                   3.3.3            py39haa95532_0
pandas                       2.3.3            py39ha5e6156_0
pandas-datareader            0.10.0           pypi_0           pypi
papermap                     0.3.0            pypi_0           pypi
parso                        0.8.4            py39haa95532_0
patsy                        1.0.1            py39haa95532_0
pcre2                        10.42            h0ff8eda_1
pickleshare                  0.7.5            pyhd3eb1b0_1003
pillow                       10.4.0           pypi_0           pypi
pip                          25.2             pyhc872135_1
pixman                       0.46.4           h4043f72_0
platformdirs                 4.3.7            py39haa95532_0
plotly                       6.3.0            py39hbc747e5_0
pluggy                       1.5.0            pypi_0           pypi
ply                          3.11             py39haa95532_0
pmdarima                     2.0.4            py39ha55e580_2   conda-forge
proj                         9.3.1            h4c8f42b_1
prompt-toolkit               3.0.52           py39haa95532_1
psutil                       7.0.0            py39h02ab6af_1
pure_eval                    0.2.3            py39haa95532_0
py-xgboost                   2.1.4            py39haa95532_0
pybind11-abi                 5                hd3eb1b0_0
pycparser                    2.23             py39haa95532_0
pydantic                     2.11.7           pypi_0           pypi
pydantic-core                2.33.2           pypi_0           pypi
pygments                     2.19.1           py39haa95532_0
pyluach                      2.2.0            pyhd8ed1ab_1     conda-forge
pymeeus                      0.5.12           py39haa95532_0
pyogrio                      0.10.0           py39h10c4007_1
pyparsing                    3.2.0            py39haa95532_0
pyproj                       3.6.1            py39hf2101be_1
pyqt                         6.9.1            py39h12ec796_0
pyqt6-sip                    13.9.1           pypi_0           pypi
pysal                        2.1.0            pyhd3eb1b0_0
pyshp                        2.3.1            pypi_0           pypi
pysocks                      1.7.1            pypi_0           pypi
pytest                       8.3.4            pypi_0           pypi
pytest-timeout               2.4.0            pypi_0           pypi
python                       3.9.23           h716150d_0
python-dateutil              2.9.0post0       py39haa95532_2
python-fastjsonschema        2.20.0           py39haa95532_0
python-tzdata                2025.2           pyhd3eb1b0_0
python_abi                   3.9              2_cp39           conda-forge
pytz                         2025.2           py39haa95532_0
pywavelets                   1.6.0            py39h4b0a98a_0   conda-forge
pywin32                      311              py39h885b0b7_0
pyzmq                        27.1.0           py39h7149c55_0
qtbase                       6.9.2            h916ffc4_3
qtdeclarative                6.9.2            h88b4c33_1
qtsvg                        6.9.2            h30ace32_1
qttools                      6.9.2            h7e7b719_0
qtwebchannel                 6.9.2            heb02b0b_1
qtwebsockets                 6.9.2            heb02b0b_1
referencing                  0.30.2           py39haa95532_0
regex                        2024.11.6        pypi_0           pypi
requests                     2.32.5           py39haa95532_0
rpds-py                      0.22.3           py39h636fa0f_0
rtree                        1.4.1            py39h1e5ca3c_0
ruptures                     1.1.9            pypi_0           pypi
safetensors                  0.5.3            pypi_0           pypi
scikit-base                  0.12.5           pyhc455866_0     conda-forge
scikit-image                 0.22.0           pypi_0           pypi
scikit-learn                 1.6.1            py39h585ebfc_0
scipy                        1.13.1           py39h8640f81_1
seaborn                      0.13.2           py39haa95532_3
setuptools                   72.1.0           py39haa95532_0
shapely                      2.0.6            py39hba19cfc_0
simplejson                   3.20.1           pypi_0           pypi
sip                          6.12.0           py39ha51f57c_0   conda-forge
six                          1.17.0           py39haa95532_0
sktime                       0.38.4           py39hcbf5309_0   conda-forge
spyder-kernels               3.1.0            py39hbc747e5_0
sqlite                       3.50.2           hda9a48d_1
stack_data                   0.6.3            py39haa95532_0
statsmodels                  0.14.5           py39hf9130e5_0
stumpy                       1.13.0           py39haa95532_0
tbb                          2021.8.0         h59b6b97_0
threadpoolctl                3.5.0            py39h9909e9c_0
tifffile                     2024.8.30        pypi_0           pypi
tk                           8.6.15           hf199647_0
tokenizers                   0.21.2           pypi_0           pypi
toml                         0.10.2           pypi_0           pypi
tomli                        2.2.1            py39haa95532_0
tornado                      6.5.1            py39h827c3e9_0
tqdm                         4.67.1           py39h9909e9c_0
traitlets                    5.14.3           py39haa95532_0
transformers                 4.53.1           pypi_0           pypi
tsfresh                      0.21.1           py39haa95532_0
tslearn                      0.6.4            py39h9e4d2f2_0   conda-forge
typing-extensions            4.15.0           py39haa95532_0
typing-inspection            0.4.1            pypi_0           pypi
typing_extensions            4.15.0           py39haa95532_0
tzdata                       2025b            h04d1e81_0
ucrt                         10.0.22621.0     haa95532_0
uriparser                    0.9.8            h1a0bd13_0
urllib3                      2.5.0            py39haa95532_0
vc                           14.42            haa95532_5
vc14_runtime                 14.44.35208      h818238b_26      conda-forge
vs2015_runtime               14.44.35208      h38c0c73_26      conda-forge
wcwidth                      0.2.13           py39haa95532_0
wheel                        0.45.1           py39haa95532_0
win_inet_pton                1.1.0            py39haa95532_1
woodwork                     0.31.0           pyhd8ed1ab_0     conda-forge
workalendar                  17.0.0           pyhd8ed1ab_2     conda-forge
wrapt                        1.17.0           py39h827c3e9_0
xerces-c                     3.2.4            hd77b12b_1
xgboost                      2.1.4            py39haa95532_0
xmlschema                    3.4.3            pypi_0           pypi
xyzservices                  2025.4.0         py39haa95532_0
xz                           5.6.4            h4754444_1
zeromq                       4.3.5            h6c54ac7_1
zipp                         3.21.0           py39haa95532_0
zlib                         1.2.13           h500123d_2
zstd                         1.5.6            h8880b57_0

[jitseniesen]

Hi @ScentHounds , can you please try upgrading spyder_notebook and see whether that helps? The latest version is 0.7.1. According to the information in your report, you're using version 0.6.1 which is not compatible with Spyder 6.1.0.

[ScentHounds]

Hi @jitseniesen , thank you for your suggestion, unfortunately the 0.7.1 version of spyder-notebook didn't solve the problem. Server info is the following:
"Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
A _jupyter_server_extension_points function was not found in jupyterlab_github. Instead, a _jupyter_server_extension_paths function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server."

When I install the newest spyder-notebook the following packages are downloaded:
package | build
---------------------------|-----------------
jupyterlab-4.4.10 | pyhd8ed1ab_0 7.7 MB conda-forge
notebook-7.4.7 | pyhd8ed1ab_0 9.9 MB conda-forge
spyder-notebook-0.7.1 | pyhd8ed1ab_0 5.8 MB conda-forge
------------------------------------------------------------
Total: 23.4 MB

If I try to open an ipynb file in spyder the following error is displayed:
"Spyder could not get a list of session from the Jupyter Notebook server. Status code: 403"

So, the problem is existing yet.

[jitseniesen]

Thanks for trying it out. The first line in the server info looks serious, but I don't understand where it is coming from. I'll try to reproduce but I don't have a Windows 10 computer.

In the meantime, can you please be a bit more precise about what does not work? Does the notebook not display, or perhaps it does display but you can't execute any commands, or what?

I am moving your bug report to the spyder-notebook repository, hopefully that will not confuse things.

[ScentHounds]

Hi @jitseniesen , thank you for your answer and your time.

As you can see in this printscreen there is a limited menu on notebook area in Spyder and I can do nothing on it. I can't be opened any ipynb file. In the server info, the server is running but the following content in it:

"Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
A _jupyter_server_extension_points function was not found in jupyterlab_github. Instead, a _jupyter_server_extension_paths function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
'password' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
ServerApp.password config is deprecated in 2.0. Use PasswordIdentityProvider.hashed_password.
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
Config option kernel_spec_manager_class not recognized by SpyderServerApp. Did you mean one of: config_manager_class, kernel_manager_class, session_manager_class?
wrote error: 'Forbidden'
Traceback (most recent call last):
File "C:\Users\Bloodhound\anaconda3\Lib\site-packages\tornado\web.py", line 1846, in _execute
result = method(*self.path_args, **self.path_kwargs)
File "C:\Users\Bloodhound\anaconda3\Lib\site-packages\tornado\web.py", line 3363, in wrapper
url = self.get_login_url()
File "C:\Users\Bloodhound\anaconda3\Lib\site-packages\jupyter_server\base\handlers.py", line 784, in get_login_url
raise web.HTTPError(403)
tornado.web.HTTPError: HTTP 403: Forbidden
403 GET /api/sessions?token=[secret] (@::1) 13.09ms referer=None"

I have tried it in W11 OS, and If I try to do anything in Spyder notebook, the Spyder will be closed. :-( But that is the other story...