Sourcetree is crashing on startup

[Eyal Porat]

Sourcetree is crashing upon startup after cloning a single git repo

here are the logs

2020-10-26T17:10:22: LogHost: Initializing to normal mode
2020-10-26T17:10:23: Could not obtain git dir, D:\prod\Admin is not a git repo.
2020-10-26T17:10:23: LogHost: SuppressChangeNotifications was called (perhaps via AddRange), yet you do not
2020-10-26T17:10:23: LogHost: have a subscription to ShouldReset. This probably isn't what you want, as ItemsAdded
2020-10-26T17:10:23: LogHost: and friends will appear to 'miss' items
2020-10-26T17:10:23: Could not obtain git dir, C:\Users\<username>\AppData\Local\SourceTree\app-3.3.9 is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\Users\<username>\AppData\Local\SourceTree is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\Users\<username>\AppData\Local is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\Users\<username>\AppData is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\Users\<username> is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\Users is not a git repo.
2020-10-26T17:10:23: Could not obtain git dir, C:\ is not a git repo.

it also crashes when I am trying to add a new account under tools->authentication->add

i have uninstall\reinstall\same version\old version etc with no success 

Does anyone have the same problem? Or does anyone have solution to this?