Okay so I migrated my assets to a new project and now I am able to disable async loading thread enabled without breaking the physics and now the error disappears. I guess for now I’ll just assume that the error is coming from that option and that’s its broken in 4.18, I’ll test it out with 4.19 when it is released and see if it resolved. As for the debugging I’m not sure why but using either debug editor or debug game profiles in visual studio and hooking it with my packaged game doesn’t allow me to set breakpoints in engine code, and it might the debug files that the game puts in the directory are only for the game code and not engine code.