[Bug Report] BLC installation works with Blender 5.1.2 but throws an error

[FarbigeWelt]

Please describe the differences between the expected and observed results:
BLC installation works with Blender 5.1.2 but throws an error.

Steps to reproduce:
Install Blender 5.2.1
Install BLC 2.11.0-5-a

Please provide a simple test scene as a .blend-file:
n/a

Screenshots or rendered images:
n/a

Error message from Blender console:
macOS Terminal Log:

[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
Traceback (most recent call last):
File "/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/init.py", line 44, in
import pyluxcore
ModuleNotFoundError: No module named 'pyluxcore'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/scripts/modules/addon_utils.py", line 432, in enable
mod = importlib.import_module(module_name)
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/python/lib/python3.13/importlib/init.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 1027, in exec_module
File "", line 488, in _call_with_frames_removed
File "/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/init.py", line 49, in
raise RuntimeError(msg) from error
RuntimeError:

Could not import pyluxcore.

ImportError: No module named 'pyluxcore'
Traceback (most recent call last):
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/scripts/modules/addon_utils.py", line 432, in enable
mod = importlib.import_module(module_name)
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/python/lib/python3.13/importlib/init.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1324, in _find_and_load_unlocked
ModuleNotFoundError: Add-on not loaded: "bl_ext.user_default.BlendLuxCore", cause: No module named 'bl_ext.user_default.BlendLuxCore'
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
01:53.807 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)

Operating System: macOS 26.3.1 (a) (25D771280a)
Blender version: 5.1.2
BlendLuxCore version: 2.11.0-5-a
Pyluxcore version: 2.11.0a5
CPU and GPU model: M1, 16 GB

Remarks
Maybe Installation works with other BLC 2.11.0 alphas what is going to be tested and reported soon in scope of this Issue here.

[FarbigeWelt]

I've tried to install different version of BLC 2.11.0 but none of them installed properly on my system.
Also BLC 2.10.2 did not install properly. Looks like there is something wrong with path definitions and/or version checking of pyluxcore.

macOS 26.3.1 (a) (25D771280a)
M1, 16 GB
Blender 5.1.2
BlendLuxCore 2.11.0

michael@MacBook-Air-von-Michael Blender_5.1.2.app % ls
Contents
michael@MacBook-Air-von-Michael Blender_5.1.2.app % cd Contents
michael@MacBook-Air-von-Michael Contents % ls
_CodeSignature MacOS PlugIns
Info.plist PkgInfo Resources
michael@MacBook-Air-von-Michael Contents % cd MacOS
michael@MacBook-Air-von-Michael MacOS % ls
Blender
michael@MacBook-Air-von-Michael MacOS % ./Blender
Repository data: /Users/michael/Library/Application Support/Blender/5.1/extensions/blender_org not found, sync required!
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
00:19.301 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
00:38.632 blend | Saved session recovery to "/var/folders/t6/db2vl0xx3z7g6ccdy2hk3prh0000gn/T/quit.blend"
00:38.637 blend | Writing user preferences: "/Users/michael/Library/Application Support/Blender/5.1/config/userpref.blend"
00:38.639 reports | Preferences saved

Blender quit
michael@MacBook-Air-von-Michael MacOS % ./Blender
Repository data: /Users/michael/Library/Application Support/Blender/5.1/extensions/blender_org not found, sync required!
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Module name: bl_ext.user_default.BlendLuxCore
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
00:17.254 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
00:28.231 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
00:37.011 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)
[BLC] Ensuring pyluxcore
[BLC] Checking installation info ('/Users/michael/Library/Application Support/Blender/5.1/extensions/.user/user_default/BlendLuxCore/pyluxcore_installation_info.txt')
[BLC] Installing pyluxcore version: 2.11.0a5
[BLC] Skipping pyluxcore installation. Similar wheel(s) already installed.
00:48.070 operator | ERROR
|
| Could not import pyluxcore.
|
| ImportError: No module named 'pyluxcore'
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)
[BLC] installing pyluxcore version: 2.10.1
[BLC] _download_wheel Output:
Collecting pyluxcore==2.10.1
Using cached pyluxcore-2.10.1-cp313-cp313-macosx_11_0_arm64.whl.metadata (5.9 kB)
Collecting numpy>=2 (from pyluxcore==2.10.1)
Using cached numpy-2.4.6-cp313-cp313-macosx_14_0_arm64.whl.metadata (6.6 kB)
Using cached pyluxcore-2.10.1-cp313-cp313-macosx_11_0_arm64.whl (81.5 MB)
Using cached numpy-2.4.6-cp313-cp313-macosx_14_0_arm64.whl (5.2 MB)
Saved /Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/wheels/pyluxcore-2.10.1-cp313-cp313-macosx_11_0_arm64.whl
Saved /Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/wheels/numpy-2.4.6-cp313-cp313-macosx_14_0_arm64.whl
Successfully downloaded pyluxcore numpy

[BLC] _download_wheel Errors:

[notice] A new release of pip is available: 25.2 -> 26.1.1
[notice] To update, run: /Applications/Blender_5.1.2.app/Contents/Resources/5.1/python/bin/python3.13 -m pip install --upgrade pip

nvrtc: Python module not found
01:03.825 operator | ERROR cannot import name 'matrix_to_list' from 'bl_ext.user_default.BlendLuxCore.utils' (/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/utils/init.py)
reloading addon meta-data: bl_ext.user_default.BlendLuxCore '/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/blender_manifest.toml' (time-stamp change detected)
01:25.427 blend | Writing user preferences: "/Users/michael/Library/Application Support/Blender/5.1/config/userpref.blend"
01:25.429 operator | Preferences saved
01:30.053 blend | Saved session recovery to "/var/folders/t6/db2vl0xx3z7g6ccdy2hk3prh0000gn/T/quit.blend"
01:30.056 blend | Writing user preferences: "/Users/michael/Library/Application Support/Blender/5.1/config/userpref.blend"
01:30.058 reports | Preferences saved

Blender quit
michael@MacBook-Air-von-Michael MacOS % ./Blender
Repository data: /Users/michael/Library/Application Support/Blender/5.1/extensions/blender_org not found, sync required!
[BLC] skipping pyluxcore installation. Specified version already installed.
Traceback (most recent call last):
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/scripts/modules/addon_utils.py", line 432, in enable
mod = importlib.import_module(module_name)
File "/Applications/Blender_5.1.2.app/Contents/Resources/5.1/python/lib/python3.13/importlib/init.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 1027, in exec_module
File "", line 488, in _call_with_frames_removed
File "/Users/michael/Library/Application Support/Blender/5.1/extensions/user_default/BlendLuxCore/init.py", line 321, in
raise RuntimeError(msg + "\n\nImportError: %s" % error) from None
RuntimeError:

**Could not import pyluxcore.

ImportError: No module named 'pyluxcore'**
00:33.334 blend | Saved session recovery to "/var/folders/t6/db2vl0xx3z7g6ccdy2hk3prh0000gn/T/quit.blend"
00:33.339 blend | Writing user preferences: "/Users/michael/Library/Application Support/Blender/5.1/config/userpref.blend"
00:33.341 reports | Preferences saved

Blender quit