Welcome to the community.
Did you read and correctly follow the important information on how to launch the trainer correctly? If you haven’t done so then the trainer will not work.
Find them by clicking the Info button in the trainer. Or in the first post of the trainer’s Official thread: Warhammer: Vermintide 2 Cheats and Trainer for Steam.
Also, in the future, please provide. Ore information than just an image. Such as what you are doing exactly and where you got your copy of the game from.