Sims 4 will not let me use cheats.

In this last update they disabled many of the cheats we use regularly. This was done on purpose, though they will tell you they are "working on it." To get your cheats working again, you need to download and use TMex's All Cheats script (put it in your Mods folder). Follow the directions. 

TMex's All Cheats

Edit (crin): Removed mod links. Please only name mods without linking as linking to 3rd party content is not allowed on AHQ.

If you try putting the command in while being in CAS or buying a lot, you won't be able to do it. Try buying any lot, then do the command testingcheats on