Coupon code not function

I tried to apply coupon code to give 200 USD discount to specified customer. However i realized the coupon code cannot been used at all too. Any advice?

To whoever can help me out, this is the temporary coupon code:
Lifetime = indefinite
Discount = USD 200
Start Date 3 July 2018
Expire Date = No end
Level = Any level
Remaining uses = 3

WPMU-YEAH