TS4 Mods wont activate after Toddler update

So what's the problem? Error message implies you can reactivate them: "Please be careful if you decide to reactivate mods in the options".

"All mods have been disabled because they may not be compatible with the update." - this is more important message. Mods are created to work with specific version of the game. If you use them with another (older or newer) they may break your game or even corrupt your save file. If you want to use up-to-date mods, update your game to the last version first.

If you want to just update your game (or update+install all DLCs but in much smaller download) consider using my repack.