My Editor Keeps Crashing on startup

Unity Engine
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1

I Dont Know Whats Causeing It But I Have This Error System.NullReferenceException: Object reference not set to an instance of an object.
at ApiUpdater.MovedFromOptimizer.Program.CollectMovedFromTypeNamesFromAssembly(String assemblyPath, StreamWriter outputFile, IAPIUpdaterListener logger)
at ApiUpdater.MovedFromOptimizer.Program.RealMain(String args)
at ApiUpdater.MovedFromOptimizer.Program.Main(String args)

2

Are you trying to open a project that was last opened with an older version of Unity?
Because I think ApiUpdater is our automatic tool at attempting to update code between versions when the API changes, but looks like it’s not working correctly.
Try starting in safe mode and/or modifying the scripts yourself to the new version