Bell's Seven Stars INC. review for CRO Cart Drawer & Free Gifts

Honestly, It's a very great App. However, I encounter some issues; I don't know if it's due to my Theme or not. When I try to ADD TO CART it worked at first, but now it keeps saying CART IS EMPTY, CONTINUE TO SHOPPING. I did something wrong please help. I WON'T REMOVE THIS APP...