title: git push with git-cola failing
body: <p>I started getting the following error a week ago when pushing with git-cola...I found something about a similar problem happening a lot a couple years ago but it didn't help at all.</p>
  
  <pre><code>"git push" returned exit status 128
  
  Have you rebased/pulled lately?
  
  Already up-to-date.
  
  Pushing to https://github.com/slacktracer/lokapala.git
  error: cannot run None: No such file or directory
  fatal: could not read Username for 'https://github.com': No such device or address
  </code></pre>
  
  <p>When I push with the terminal it works just fine, so perhaps it is mostly a question about git-cola. Anyway, just wondering if anyone can help. I'm lost right now...</p>