Errno 'jupyter-labextension' not found about jupyter-ros HOT 4 OPEN

can you install jupyter lab first? pip install jupyterlab

from jupyter-ros.

can you install jupyter lab first? pip install jupyterlab

thanks, I got it.

from jupyter-ros.

can you install jupyter lab first? pip install jupyterlab

oh no, I got another error

D:\python\jupyter-ros-master>jupyter nbextension install --py --symlink --sys-prefix jupyros
The rospy package is not found in your $PYTHONPATH. Subscribe and publish are not going to work.
Do you need to activate your ROS environment?
Installing d:\python\jupyter-ros-master\jupyros\static -> jupyter-ros
Symlinking: D:\Anaconda3\envs\tf2test\share\jupyter\nbextensions\jupyter-ros -> d:\python\jupyter-ros-master\jupyros\static
Traceback (most recent call last):
File "D:\Anaconda3\envs\tf2test\Scripts\jupyter-nbextension-script.py", line 10, in
sys.exit(main())
File "D:\Anaconda3\envs\tf2test\lib\site-packages\jupyter_core\application.py", line 266, in launch_instance
return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
File "D:\Anaconda3\envs\tf2test\lib\site-packages\traitlets\config\application.py", line 658, in launch_instance
app.start()
File "D:\Anaconda3\envs\tf2test\lib\site-packages\notebook\nbextensions.py", line 988, in start
super(NBExtensionApp, self).start()
File "D:\Anaconda3\envs\tf2test\lib\site-packages\jupyter_core\application.py", line 255, in start
self.subapp.start()
File "D:\Anaconda3\envs\tf2test\lib\site-packages\notebook\nbextensions.py", line 716, in start
self.install_extensions()
File "D:\Anaconda3\envs\tf2test\lib\site-packages\notebook\nbextensions.py", line 695, in install_extensions
**kwargs
File "D:\Anaconda3\envs\tf2test\lib\site-packages\notebook\nbextensions.py", line 225, in install_nbextension_python
destination=dest, logger=logger
File "D:\Anaconda3\envs\tf2test\lib\site-packages\notebook\nbextensions.py", line 184, in install_nbextension
os.symlink(path, full_dest)
OSError: symbolic link privilege not held

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Installing extensions with the jupyter labextension install command is now deprecated and will be removed in a future major version of JupyterLab.

from jupyter-ros.