Can't even delete an app on a fresh erpnext

This is on the virtualbox image which is provided on your official website:

Any idea why this error?

I will reply myself for anyone who faced this issue, if you are in a dev environment:
YOU MUST BE RUNNING THE Bench in order for a such command to work (bench start). I thought one had to stop it before deleting, I was wrong.

I don’t recall I have seen this mentioned in documentation.

Only ‘bench’ needs to be running.