Recent updates for the console versions of both Fallout 4 and Skyrim have introduced new restrictions on mods for the console versions of the game. The new restrictions are said to improve game stability.
The new restrictions came with the updates that were released ealier this week in an effort to improve the stability of the games on consoles.
With the new update the number of mods that can run at the same time will be capped to 150 on the Xbox One and 100 on the PlayStation 4. With the new caps, some players will not be able to reach the full storage limit for mods.
The new restrictions on console mods come from internal testing for the stability of the game, though how the new caps enhances the overall stability is unknown.
The PC versions of both games unofficially supported mods since their release and no mod restrictions are put in place, likely because the PC platform is more than capable of running the games with mods enabled.