Is your game version Uplay or Uplay+? There is one trainer for each, make sure you’re using the correct one. I can see in the screenshot you gave that you’re using the regular Uplay one.
Double check that you have the correct executable added to WeMod’s custom path tool. To do this - launch the game, open Task Manager, find the game and right-click it, select open file location (if you don’t see this option, click “Expand”), drag the highlighted file to the custom path tool in WeMod. Try WeMod again.