I am having a similar issue trying to follow the nbdev_cards tutorial (on macbook with M1). I also get the first error message but not the rest.
When I run the nbdev_new command from the repo directory I get the following error:
UserWarning: Neither GITHUB_TOKEN nor GITHUB_JWT_TOKEN found: running as unauthenticated
I am then prompted to add a description even though the repo has a description already (this does not occur in the video). It then proceeds to create the files as normal. At first this doesn’t seem to cause an issue, but later in the tutorial issues arise and I am not sure if they are related (i.e. index.ipynb cannot import the card.py file created using nbdev_export).