Problem opening Trados 2021 -project management service

Hello, every time I open Trados I get the message "Sdl.TranslationStudio.Api.ProjectManagement.IProjectManagementService' could not be started. I have found the solution - namely that I have to throw away a project file in the Projects folder - but every single time I try and open Trados now I have to do this. I am looking for a permanent fix. Can anyone help?

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