Getting error Sdl.Desktop.Platform.Services.ITelemetryService - Tried all possible solutions

Thanks in advace for our help.

I'm getting the Sdl.Desktop.Platform.Services.ITelemetryService error from Studio 2021 just out of the blue.
What I tried until now:
- Uninstal & Reinstall the programm - No results
- Uninstall the programm to reinstall a previous version (Studio 2014 R1) - No result
(actually a message says that I should remove a higher version still installed, which is not true)
- Tried to rename the Studio folders "_old"  in Local and Programs - No results

I'm getting pretty desperate.
Thanks
Pamela

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