Do you have the same problem with Teams web client?
Do other users in your organization have this issue?
As said above, reset the status to be valid. Also, follow the steps below to try to clean the cache.
- If Teams is still running, right-click the Teams icon in the taskbar, and then select Quit.
- Open the Run dialog box by pressing the Windows logo key +R.
- In the Run dialog box, enter %appdata%\Microsoft\Teams, and then select OK.
- Delete all files and folders in the %appdata%\Microsoft\Teams directory.
- Restart Teams.
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