Did you ever figure it out? I am having same issue except my project is a Lyra based project. And I didn’t have the issue when I first created the project. It just started showing me the warning a few days ago. Seen this post and figured I’d save myself from reinstalling VS2022.
Personally I have tried deleting the Intermediate folder and regenerating project files. That did not get rid of the warning. I gave up after that cause I dont know of anything else to do, and my project builds fine other than that warning.
Also, when I first created the project, it was fine. I just noticed it happening a few days ago. I been moving a blueprint actor component to be a C++ Actor component. I had changed a bunch of things so I dont remember exactly what it was, just before noticing it. Heck Windows was updated recently and could have been that update that caused it. Dont really want to roll back windows tho.