Cannot run codes from my jupyter notebook

After working a while with using jupyter notebook, something happened and it seems that the jupyter notebook does not recognize my working environment

Do you have an idea of what went wrong and how to fix it?

Many thanks

Do you have the fastai folder or symlink to it in the directory you run this notebook from?
if not, then add
import sys

Thank you for your response
didn’t work

It does not seem to recognize the base commands
I get error message even when I’m training to see my path using pwd [worked before]

looks ok now
It seems that redefining the workspace has solved the problem

You need the quotes in the argument of sys.path.append, and without the second fastai, like this: