Yeah, you're getting an error that some people are talking about. This error occurs for certain users, it's a problem with the engine. I gotta wait till version 4.19 (for the Unreal Engine) releases to see if they fixed this bug. Not much I can do, sorry man.
Well, that means I'd have to download the beta, which will probably be unstable/too dangerous to use, I don't want to fuck up my games, y'know. Then once the full version comes out, I have to download it again. So yeah, it's too much work. Sorry dude. :/