Hello and welcome to WeMod.
Please check the appropriate threads below:
Uplay & Steam: Assassin's Creed Odyssey Cheats and Trainer for Uplay
Uplay+: Assassin's Creed Odyssey (Uplay+) Cheats and Trainer for Uplay
Origin: Assassin's Creed Odyssey Cheats and Trainer for Origin
Make sure you’re using the right trainer for the right launcher. If you are using a cracked version of the game the trainers will rarely ever work.