Jupyter notebook not launching

Jupyter notebook is not launching from Anaconda navigator. When I click “launch” a loading bar appears and the navigator says “launching notebook” but nothing happens. When I exit or restart the navigator a window pops up saying that the notebook is still running.

I have completely uninstalled and reinstalled Anaconda. I have performed the “pip uninstall traitlets” and “pip install traitlets==5.9.0”