(Post split from Necro-thread: Infinite loading screen on WeMod App - #5, which is about an older version of WeMod).
Hello and welcome to the community! 
The most common cause of trainers not being able to inject into games is due to interference from security programs on your PC or network. See: "Wemod failed loading the cheats into your game" / "We’re having trouble downloading the cheats" - #2 by Ravenfyre for the necessary instructions to solve that.
Otherwise:
1, What game(s) are having the issue?
2. What store did you get the games from or are they cracked/pirated?
3. What country are you in right now?