Steps:

Fix Option 1
In Windows, please see steps below.

1. If Teams is still running, right-click the Teams icon in the taskbar, and then select Quit.
   

2. Open the Run dialog box by pressing the Windows logo key +R.
   
   

3. In the Run dialog box, enter %appdata%\Microsoft\Teams, and then select OK.
   

4. Delete all files and folders in the %appdata%\Microsoft\Teams directory.
   

5. Restart Teams.