I'm having the same problem. I've tried rebooting the game and the trainer several times. When I do finally get it to activate, none of the cheats work. At other times, it will freeze up and repeatedly say "error" over and over again. I haven't had any problems with it before.
[Edited by lungsofiron, 2/7/2016 5:39:57 PM]
Eh.. I dunno about that.. it was doing it even when closing and reopening both, but rebooting did fix it. But yeah at that point most of the options weren't working anyway lol.
Thx for the update