SourceTree version: 2.5.1
Problem: Can't successfully connect to GitHub repositories via HTTPS or SSH
I am not using two-factor authentication.
Behavior: I can connect to my Github Account successfully (using HTTPS or SSH)

However, when I try to connect to remote repos, I get an error message like this:

Sometimes the error is 'Could not authorize request with the available token' and other times it is 'Bad credentials'.