Hello! 
Thank you for the update.
It’s very common for trainers to trigger what is called a false positive in anti-virus programs. This is caused by the way that trainers work, which is by injecting code into memory addresses that the game is using within your PC’s RAM. Trainers have been working this way (and getting flagged by anti-viruses from time to time) since the 1980s.
Interference from anti-viruses is one thing that can cause WeMod to not work correctly. There is troubleshooting for that available here: "Wemod failed loading the cheats into your game" / "We’re having trouble downloading the cheats" - #2 by Ravenfyre - The title is different to your issue, but the steps to solve it are the same.
This may also be useful: My antivirus marked WeMod as a Trojan - #2 by Ravenfyre