Have you disabled the built in “Replicate Movement” on the character so it’s not fighting with Smooth Sync? Usually character stuff with Smooth Sync is pretty straight-forward, you just throw the Smooth Sync component onto it and disable “Replicate Movement” and it works. You can test it out in an isolated environment by loading up a fresh project using the Third Person Template. You should only need to do those two steps and to get it syncing using Smooth Sync.