SDL Studio 2019, and I keep encountering Error "Service 'Sdl.TranslationStudio.Api.ProjectManagement.IProjectManagementService' could not be started".

Step 1. I have completely closed Trados Studio and started it again, but the problem still remains. 

Step 2: I navigated to the folder C:\Users\%username%\AppData\Roaming\SDL\SDL Trados Studio\15 (with hidden items visible), but the issue did not change.

Step 3: I renamed the Plugins folder to Plugins_old, however the same error still occurs.

Step 4: I also ran a repair installation of Trados Studio via Control Panel > Programs and Features, but this did not resolve the problem either.

Step 5: I restarted my computer and tried opening Trados Studio again, but the problem persists.

Step 6: I have uninstalled and reinstalled Trados Studio 2019, and the error persists!!!!!

Can someone help??