ayooo bro thanks for this it really helped me
I’m clearly too late for this but I’m getting the same error in my project written in UE 5.4. At first I didn’t understand and tried everything, regenerating the C++ code, deleting the intermediate folder, saved, etc. Until I found the STRANGER solution. If you extract the GameEngine.ini file the project will probably now open (in a map by default) but you don’t want to lose your original GameEngine.ini file so all you have to do is delete the StartupEditorMap=“name of your default map” line ". If you delete this line you do not need to delete your GameEngine.ini file and the project will open without crashing. If you assign another map or the map again to the time, the same thing will happen to you. I still haven’t figured out why this happens but this was my temporary solution.