Befor you begin, Log out and Log In to Teams and see if that makes the error go away. If not then here are some workarounds you can try to fix Error caa20001, There ...
Microsoft is resolving a known issue that causes "couldn't connect" errors when launching the Microsoft Teams desktop and web applications. The company states that ...
Microsoft rolls back faulty Teams update after widespread desktop app errors Regression in client build caching caused denial of service, leaving users unable to load messages Fix requires users to ...