As the title says, I cannot sign into Messages on 10.15 beta 7. I have tried quite a few solutions including: signing out and back into icloud, resetting keychain to defaults, changing networks, and rebooting. The app itself generally does not give any descriptive errors, but one I have found consistently in console is
Remote authentication service returned an error: Error Domain=AKAuthenticationError Code=-7034 "(null)"from AuthKit right before messages fails to log in. In the app, it just goes grey for a while, as in inactive, and then returns to the un-greyed out state and says nothing. Any thoughts or ideas?
