That option has been removed from the Files tab

[헬프데스크3]

Inquiries about options for tabbing and copying files in team channels.
That option has been removed from the Files tab.
Some people have options.
How do I move and copy files?
And when someone with the move and copy option tries to move files between teams, they get a popup stating that there was an error in the upload.
Both issues seem to be after a Teams update. Is there a workaround?

[#2]

With the given information it sounds as if your org. has implemented app enforced restrictions https://docs.microsoft.com/en-us/sharepoint/app-enforced-restrictions

More detailed here https://docs.microsoft.com/en-us/sharepoint/control-access-from-unmanaged-devices