bitbucket can't pull/push from repository

Question

So basically I have a server where I have bitbucket git repository set up. I\'ve been using it for months and now out of the blue sky when I try to pull I get the following erro

Answer 1

Just in case none of those answers helped, in my case I was using a "ghost" terminal session. The output of "whoami" was showing some unknown user, and the solution was to close and open a new console window.