project not opening

Well problem started with plugins adding/ removing. When i start the project it loads until 79% : un unral process has crashed. Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp] [Line: 4291] Failed to load UnrealEd Engine class ‘/Script/DisplayClusterEditor.DisplayClusterEditorEngine’.
I cannot find any saved files from before, it also doesnt store project states in the documents folder.