This post will provide you with viable solutions to get rid of this issue in no time. If you’re also experiencing the Fallout 4 Mods not working on Xbox and PC, don’t worry. In most cases, the problem occurred when using the Nexus Mod Manager (NMM) in order to Mod the game. The problem leads to game crashing, or in some cases, the black screen error. Recently, many players reported that the Mods are not working on Fallout 4.