This happens to me too, but when i uninstalled some mods, it started to kind of work. Some of whynotboi's tips is that it could be because of issues or too many addons. Maybe try uninstalling some addons you don't want and maybe that will help. He also said that it could also be because of incorrect branches, because the branch your using may not be supportable enough for your computer, so maybe try switching to the 64x branch. Hope this helps!