Hello forums! I just got my ticket for a forum account answered and here I am

I've contacted support about this but I still haven't received an answer. Game is installing so I haven't logged in yet.
I write this in order to know if anyone else had my issue. Basically I've registered the game with the main code without issues but now if I open "Redeem Code" there is the popup same as before "Please enter your Game Registration Code first, then any Membership Time Code or promotional code below."
The problem is that if I write in the Explorer's Pack code, it says it's invalid. Can't I redeem it anymore???