I tried recreating the streaming folder before but didn't have it work, possibly because of what you said about rebuilding the file, I'll test some more. Thanks for the response.
@a shady hermit Are you using the latest version? Because the latest version doesn't have the stream folder anymore, which is why I'm having trouble getting .ymt files to work.
I've installed everything correctly and when I place mods that I've made into the mod manager it says that they are automatically converted, however when launching no mods are working.