Just tried to open up my UE project and I’m stuck at the 75% with the note Finalizing load of MaterialExpressionConstant_1.
I’ve tried restarting my computer, starting the project from Epic Games Launch, launching the Unreal Engine Project directly in the files but nothing seems to work.
Old thread but in my case, it was caused by a static ConstructorHelpers::FObjectFinder that was pointing to a valid object, but the object itself was causing a problem. I deleted it and recreated it, pointed the constructor helper to the new item and it opened no problem at all.