No module named ipykernel_launcher
I was facing the same issue some time ago. Un-installing and re-installing jupyter from your virtual environment using conda/pip may help.
Installing pip correctly is the answer
install pip in the new directory, and from there- download jupyter-lab again.
I found uninstalling the version of Python then reinstalling it worked for me with no issues.
The error is due to the unavailability of the module named
Try this, this should work.
pip uninstall ipykernel # this may or may not be installed. pip install ipykernel