A branch was deleted on the remote, and when I open my local repository, which has been fetched via command line, a dialog keeps popping up with "git log failed with code 128: fatal: bad revision 'origin/<branchname>'".

Only problem is that I cannot change anything since the popup keeps coming faster than I can click anything.

I was able to close other tabs in SourceTree for other repositories, but the one failing I cannot close. It seems hung on failing with the mentioned error.

Every time I restart SourceTree the problem starts over.

(It does however create a pretty pattern, see attached screenshot)