Recently a few of my guild mates and I decided to challenge good ol' Greinjack for a duel. When we decided to battle him it kept saying "Failed to Interact with Npc". This is what it shows on our screen's when we attempt to battle Greinjack, (We're also aware of the requirements to battling Greinjack). I hope this problem is resolved quickly, thank you for your time.
https://image.prntscr.com/image/71f50da1049943fdb5d869e06c45f654.png <-- Screen Picture.