ModuleNotFoundError: No module named 'omni.isaac.lab'

[sunnyhigh521]

wkz@wkz-MS-7C82:/Documents/sql/viplanner/IsaacLab$ ./isaaclab.sh -p /home/wkz/Documents/sql/viplanner/omniverse/standalone/viplanner_demo.py --scene matterport --model_dir /home/wkz/Documents/sql/viplanner/viplanner/model
[INFO] Using python from: /home/wkz/Documents/sql/viplanner/IsaacLab/_isaac_sim/python.sh
Traceback (most recent call last):
File "/home/wkz/Documents/sql/viplanner/omniverse/standalone/viplanner_demo.py", line 16, in
from omni.isaac.lab.app import AppLauncher
ModuleNotFoundError: No module named 'omni.isaac.lab'
There was an error running python
wkz@wkz-MS-7C82:/Documents/sql/viplanner/IsaacLab$

I followed the instructions to install the plugins in the extension directory, but I'm still encountering this error. How can I resolve it?