Additional sign-in or account-related issues within Microsoft Teams Free
Thanks for your reply.
To isolate the issue with your user profile, please try to create a new user account and install the Teams app to the new account.
Now, sign in with your Teams free account and check the outcome.
To know how to Create a New User in Linux, see
https://linuxize.com/post/how-to-create-users-i...
Disclaimer:
Note: Link shared in this conversation is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Regards
Nik