People not walking in Lumen RT

I was just working on LumenRT Build 2015502024, and I added a person and animated them, but then their legs are not animated but just the model itself moves. The model is empty besides this person.

My computer specs are this: Just looking for some direction in this problem,

Thanks!

Windows 10

Intel Core i7-4720HQ

16gb RAM

Nvidia GeForce GTX 960M graphics card