Problem Activating Cheats On ANY Game

Good day! i’m writing you for a little issue i have activaing the cheats. For some reason, the program doesn’t allow me to activate any cheat of any game. i place the cursor on the “on, off” option and a “denied” icon appear. Any idea of what is happening?

You didn’t press play beforehand.
There needs to be a checkmark next to play aswell

actually, it worked! i run the game first and then it allow me to activate the cheats. Thank you!!!