Treyarch and Beenox update BOCW frequently. Each update changes the game’s executable memory addresses. A trainer designed for v1.10 will never work on v1.15. The "Fling fix" usually refers to either:
Trainers function by editing active memory, a behavior that mimics viruses and Trojans. call of duty black ops cold war pc trainer fling fix
Fling trainers use specific hooking methods. If you press F1 (activate) and hear a beep but F2 (God Mode) does nothing: Treyarch and Beenox update BOCW frequently
The primary "fix" for making a trainer work in BOCW involves bypassing the online connectivity requirements. Option B: Use a trainer explicitly designed to