Reforged mode unavailable

Hi,
I used my old WC3 CD key a couple of weeks ago and everything works smooth. But when I want to access the ‘Reforged mode’, it says that the reforged mode is unavailable.
My system is above the system requirements and my license is valid. Anyone knows what the problem is?

Probably because your old WC3 CD key only grants you Classic mode and Reforged is a separate content entity you need to purchase?

Ah, didn’t realize this. Thx for the comment.