Oh sorry, I misunderstood your situation. No, if you’re using the classic notebook none of that JupyterLab info is necessary
I’d recommend double checking that you have "notebook>=5.3"
and "ipywidgets>=7.2"
installed using either conda or pip (not both).
If that doesn’t help, could you include your full output of:
pip list
jupyter nbextension list
conda list
-Jon