Black Screen Instead of Main Menu

So, I'm playing my game into the wee hours of the morning. Everything's fine, but then I decide I'm going to click the enable script mods, etc, so I can use the UI mod because why not, right? Well, it goes downhill from there. My game loads but doesn't show me the menu, only a black screen. I try verifying files. I remove the mod. I tried uninstalling and reinstalling. I'm really confused because I genuinely wasn't having any other issues before this. I don't use any CC. My game is very vanilla. Any ideas what I can do?