Error TypeError: expected str, bytes or os.PathLike object, not NoneType when inport library : PySiddhi.core.SiddhiManager

[nguyenvanson1998]

Traceback (most recent call last):
File "helloworld.py", line 3, in
from PySiddhi.core.SiddhiManager import SiddhiManager
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/SiddhiManager.py", line 19, in
from PySiddhi.core.SiddhiAppRuntime import SiddhiAppRuntime
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/SiddhiAppRuntime.py", line 18, in
from PySiddhi.core.debugger.SiddhiDebugger import SiddhiDebugger
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/debugger/SiddhiDebugger.py", line 23, in
from PySiddhi.core.event.ComplexEvent import ComplexEvent
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/event/ComplexEvent.py", line 23, in
class ComplexEvent(object):
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/event/ComplexEvent.py", line 28, in ComplexEvent
class Type(Enum):
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/core/event/ComplexEvent.py", line 30, in Type
"io.siddhi.pythonapi.proxy.core.event.complex_event.TypeProxy")().CURRENT(),
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/SiddhiLoader.py", line 131, in _loadType
loadLibrary()
File "/home/thienchuaheadshot/.local/lib/python3.7/site-packages/PySiddhi/SiddhiLoader.py", line 97, in loadLibrary
class_paths = ['.', os.path.join(siddhi_home, 'lib', '*')]
File "/usr/lib/python3.7/posixpath.py", line 80, in join
a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType

[vishnu9400]

export SIDDHISDK_HOME="{directory in which sdk was downloaded }/siddhi-sdk-5.1.0"

Run the above line of code before running your code. it works