How To Fix 'CreateExport' Error

Hi, I have this error and I don’t know how to fix it.

[ Error : Blueprint could not be loaded because it derives from an invalid class …]

I always open projects in visual studio IDE.
But this time, I just chose a project from Launcher and opened it, but the blue print I created doesn’t seem to load.
Does anyone know why and how to fix it?

I solved this problem.
I didn’t build with “DebugGameEditor” in visual studio, but I built with “DevelopmentEditor” and the error disappeared. Everyone, keep that in mind