I have physics enabled, and collision is working, but enabling gravity has no effect. The movement component states gravity is not implemented, so I was wondering how Ben seems to have it working in the video when he jumps.
Have you tried this? Maybe it could help: Make it as PhysicsActor
Make sure that your setting are correct. Your project might not be running your pawn blueprint as the default, which was the issue in my case.
go to Setting > Project Settings > Maps & Modes > Default Modes.
Check that your game mode is correct, and under Selected GameMode, make sure you pawn blueprint is selected.