Hello,
1. Please add this code in Custom css, as a temporary solution:
.top-bar .cart-popup .btn-view-cart, .top-bar .cart-popup .btn-checkout { color: #fff; }
after next theme updated this will be fixed. 2. You need to delete this code http://prntscr.com/i5fvry from your Theme Options > Styling > Custom css > Global Custom css.
Regards
