Could you please submit an issue in GitHub? https://github.com/thawkin3/plagiarism-checker

The more details you can provide, the better. Do you have steps to reproduce the issue? A forked repo you can link to? Are you using the same version of Python and the other dependencies as I am? At what point in the tutorial are you getting the error?

In general when asking technical questions, you should try to make it as easy as possible for the other person to help you.