Virtual Boy won't load even after core installed

I’m trying to load via Lakka and by default Virtual Boy doesn’t have a core but I downloaded the Mednafen core and the games load a black screen where it says the controller is detected and I can pull up the Quick Menu but the game doesn’t actually play.

What am I missing here? Other people seem to have gotten it to work just fine.

Do you have rewind enabled? If so, try turning it off before loading a game.

I just checked to make sure and it’s off for sure

Works fine here. Perhaps you have a bad ROM dump? Have you tried m/any others?

They were verified with the no-intro data file…grrrrrr, it’s just frustrating that I got Sega CD games manually configured but I can’t get these to work, lol!