Hey, everyone.
The error message should stop appearing whenever we can update the engine again - possibly in a hotfix. If you’re on the github version, you can pull this:
https://github.com/EpicGames/UnrealEngine/commit/f76548b95ae620df5903fc21885c3b94306557f1
However, I don’t see any reason that this should prevent a project from building. It’s just an error message. It’s possible there’s another issue preventing you from building - do you have any leads as to what that could be?