If the Microsoft Teams app is causing problems on Windows 10, you can clear the cache files to fix the issue. Sometimes, when you use the communication and collaboration app, you may stumble into some problems, such as the new picture profile won’t reflect across the experience, you may not be able to sign in, or an add-on or specific feature won’t work. If this happens, you may be able to delete the app’s cached files with a simple command to resolve the problem without having to reinstall the application.
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Close Microsoft Teams.
Search for Command Prompt, right-click the top result, and select the Run as administrator option.
Type the following command to clear the Microsoft Teams client cache and press Enter:
rmdir /q /s %appdata%\Microsoft\Teams
Reopen Microsoft Teams.