iMessages: INTERNAL: Expired Device Credentials

[jsamuels]

I haven't been able to logon to iMessages since updating to build 18A389 and receive the expired devices message in the title. I've tried logging out of iCloud and iMessages from all my devices, and while I can access from my iPhone and iPad, I still receive the message on my MacBook Air. Any thoughts?

 

[crjackson2134]

iCloud>Manage Devices>Remove xxxx

Then restart and setup iCloud/iMesseges again.