3rd person character

I am making a game and I started using the infinity blade warrior free pack. But when I change the third person character to one of them the character would move but didn’t animate it just floated. I posted so topics asking about this and nothing helped. So I ditch the warriors and went to make human to make my own character. After that I exported it to unreal as a FBX. I re targeted the skeleton and everything but it still just floats over the ground. I don’t know what to do.