While I've already submitted a bug report in-game (I think that's all I can do about it while playing the game), here's what's going on:
I'm trying to finish the elemental level 35 questline for Eureka Pagos. I did the first event of picking the quest up from Krile, then did the second event of the cutscene at the northeast part of the map. Right afterward, I got killed by a mob and was forced to respawn, causing me to level down to 34 (out of the quest level). While I did grind my way back to level 35, whenever I try to initiate the final event of talking to Krile at Icepoint once more, it initiates her dialogue, then it either goes to an endless black loading screen or it force quits my game client.
Regardless of instance, this happens every single time I try to finish the quest. I have completed an Elemental weapon in Pagos, I am elemental level 35, I have completed any prerequisites for the questline, yet I am apparently not allowed to finish this one questline, meaning that I am not allowed to progress in Eureka until this is resolved.