After managing to get 5 presents from the Recommended quests, earning me that Gunblade atlas 15* star weapon and all the needed resources to switch the weapon category, I went to talk to Zig.
Now, I wanted to switch the weapon category to Assault rifle, because I wanted to have an 15* star Assault rifle that I will use once the Phantom class arrives to NA server
However, I did not manage to switch the weapon category. While I had all the needed resources, the option to "Exchange" was blanked out, meaning I cant click this option, neither I can set the amount of resources I want to exchange, when I want to change the amount, nothing happens.
SEGA really be need to work out on the game glitches and issues.