How to fix Python ValueError:bad marshal data?

Question

Running flexget Python script in Ubuntu, I get an error:

$ flexget series forget \"Orange is the new black\" s03e01
Traceback (most recent call last):
File \         


        

Answer 1

There also appears to have been some sort of regression in setuptools with use with python 3.7. See for an example - https://github.com/pypa/setuptools/issues/1257

Forcing reinstallation of setuptools fixed this issue for me.

sudo pip3 install --upgrade --force-reinstall setuptools