The Cheat Mod post has various sections like "Installation", "Change-Log" and "Troubleshoot", where you can find common issues and it should act as FAQ!
However..
1. Are you using Windows or Android version of the game?
2. Are you following the Installation steps? and location of the <*.rpyc> file you saved.
3. Are you able to see the "Cheat" icon in the Profile / Character info. page?
4. Are you able to see the changes once you click the Cheat icon for each Character?
5. After you adjust the cheat values, are you able to close the Cheat menu with the "X" button on top right corner?
6. Did you read and understand the latest change-log of the Game?
(This Cheat mod could always have future stats established, which will only work when the Game is updated to use it.)
and if you have done all the above - now what is not working?