Hi you all.
I would like to share my experience with this matter.
I have been experiencing this issue for a long time and I find out that in my case it always is related with some asset in the project that is not validated by UEFN but that does not put up an error (A texture that is too big, a verse device that has one object not well referenced…etc).
What I recomend is to test every addon of your project every time, in other UEFN project. Check that everything is correct and continue
If you have added new assets of verse files in your project recently, try to remove them and rebuild it. There is something creating errors in your project but it does not put up.
For example, my last experience with this issue was very trivial: Just a texture that was too big. I just opened it and close it after. The Moderation Warning disapeared after that.