Cannot Login to Private Git Repo in W4B6

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on click of login nothing happens - waited for a few minutes.
had to cancel then. after that on going back to git pane - getting this login popup again. and still cannot login.
this is an existing project that was opened with W4B6

As of B9 this is not yet fixed.
also, Git problems mentioned here: Git Login to Remote Repo Issues also persist as of B9.