It's happening to me too on my dev account, I tried on a normal account and it works fine.
I get this error on the deb account when Anisette is ticked:
Got error: Login failed (-36607): Unable to sign you in to your Apple ID. Try again later.
Retrying with alt Anisette
ERROR: Guru Meditation f8880e@244:3aea77 Login failed (-36607): Unable to sign you in to your Apple ID. Try again later.
And this when it's unticked:
ERROR: Guru Meditation f8880e@876:3aea77 Failed: (3019) Authentication Error. Xcode 7.3 or later is required to continue developing with your Apple ID.
