Another bugged quest

Don't know if it's just me or this happens to other people too, but i can't turn in the quest "Defeat 2nd Rank Asmodian Soldiers". The quest is done, i just need to talk to Sakmis and chose the reward between different manastones. I tried to chose every single one of them, same outcome, the quest doesn't end. One of the choices actually opens the broker window LOL. The others just open a window where it says something with "load fail, Quest_Q1709.html bla bla bla" or something like that. Tried relogging, tried quiting the game and coming back to try after a few hours, nothing, same outcome.

 

Dont like to see the truth server goes backwards