iMessage not working on Big Sur
Just updated to Big Sur from Catalina on a 16" MBP, and now my iMessage doesn't work. On launch it prompts me to sign in, and when I do, it displays the iMessage interface with all my chats for about 10-20 seconds before it quits and gives me that same prompt again.
If I try to send a message while the interface is displayed it gives an error message about iMessage not being enabled :/
Weirdly enough, the iMessage preferences windows does not open nor is iMessage or FaceTime listed under the services using my iCloud account.
Does anyone know what exactly is happening here, and if there is a fix?
ps: iMessage works fine on my iPad which uses the same AppleID
MacBook Pro 16″, macOS 11.0