u/CMed67

This started with our receptionist's phone (Yealink MP58) needing to be restarted after an update. She can't sign back in even after a full reset and Broker authentication, she get's the message "Sorry, but we're having trouble signing you in, please try again". I tried wth a different phone (MP54), same issue. Any phone that get's signed out of or restarted, now can't be signed back into.

I even reflashed one of the MP54s with Yealinks package, no change. As soon as you attempt to Broker auth and sign in, the phone displays the message.