There is an error in handling the request

I have already bought a CD-key for Warcraft III: The Frozen Throne and have already redeemed it in my account but I still cant play the game. I tried reinstalling the game yet the same issue “there is an error in handling the request” still appears when i enter the game. Should I have bought the ROC instead?

ps i dont have reforged yet

That’s correct. In order to play the current version of the game, you need to link a RoC key to your Battlenet account. That will unlock both RoC and TFT.