Stuck at quest after i got 90K error

Hi,
I was at the quest "Escape from Castrum Centri" and I got disconnected with 90K
error right after i beat the final boss( 3 machine guys and one metal golem)
I couldn't log back yesterday, when I did today I found my self in front of the quest door (where i began the quest) but i couldn't click on the door, and the quest say "talk with minfilia" but there is no one around to speak to.
I teleported to walking sands to check if she is maybe there but i guess she was in the instance, and I came back out of this instance.
in short, I'm stuck, can you help me out please? I also can't abandoned the quest to start all over.

Thanks