Hard to say what’s wrong. What did you changed? I’m guessing you could delete some anim notify from animation, so logic won’t trigger. If you find repro steps, please send them here side.scroller.shooter@outlook.com
There is camera shake for sprinting already. You can see it here https://youtu.be/dwmSmcjqhxw?t=17s Look for camera shake BP in assets. You can tweak it there.