Hey there!
Are you certain your using the correct trainer? This trainer is for the GOG Game of the Year (GOTY) version of The Witcher 3: Wild Hunt. On the non-GOTY version there would likely be issues with using this trainer.
If you have the Steam version, this is the trainer you need: The Witcher 3 Cheats and Trainer for Steam
If you have the Origin version, it’s this trainer: The Witcher 3: Wild Hunt Cheats and Trainer for Origin
If you are using the correct trainer, forgive me. Just that a lot of the time when people say certain cheats aren’t working it’s because they’re using the wrong trainer. Though that’s not always the case. If you can confirm you’re using the right trainer, I’m sure MAF will look into this when he has a chance to. 