When you get an error message, paste it into the search box in the top-right of the community. 
Since WeMod has been around for years now, most error messages are likely already addressed and solved elsewhere.
Here you go: "These cheats were made for the 64-bit version of the game, you are running the 32-bit version" - #2 by Ravenfyre. (Also relevant to the opposite version of the error).