Testing Cheats

I just updated my game last night (because they are mandatory in order to play) and now I can't get testingcheats {on / off} to work. I use it almost every time I play and haven't had this problem before the new update. Is it just a bug?

I have tried almost everything related to it as well, and it does not work. It doesn't even say "Command Failed" like usual.

Help!