Ahead of the April 1st switchover, I have a user with a rather peculiar issue: he is facing this banner when trying to change to the New Microsoft Teams (work and school): "Something went wrong, and we couldn't open the new teams. Please try again."
Steps tried to resolve:
Cleared the Classic Teams cache
Cleared the New Teams cache
Added a Reg_Dword to registry (BlockNonAdminUserInstall) Set value to 0
Registry path: Software\Policies\Microsoft\Windows\Appx
The above steps did not work.
Solution:
Uninstall Teams Classic
Online Repair of Microsoft 365 suite (which now includes MS Teams) resolved the issue entirely.