Trados won't start

It's not a licensing issue but I can't find where to log a case. :( he problem is that I can't start Trados 2021 after I have upgraded to the latest version.

This message keeps popping up:

Service 'Sdl.TranslationStudio.Api.ProjectManagement.lProjectManagementService' could not be started.

My 2017 version can be started smoothly.

Does anyone know what to do?

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