Skyheim Prefab Blocker

HelheimRPG - Skyheim ObjectDB Fix

This is a patch to prevent Skyheim from causing the ObjectDB to crash on logout which causes issues with mods that affect the Menu screen. I created this so CustomMainMenu would work properly when we logged out on our server. Anyone who needs it is welcome to use it as well. It blocks the prefabs during the logout ObjectDB build, I have not seen any adverse affects in testing from applying this fix.