Hey,
I was just in chaos dungeon with 3 other people. When we were about to enter last floor, I noticed people started to leave the party as they pressed ‘Accept’ on pop-up to move forward. When I was left alone in dungeon, I wanted to progress through portal, and the game crashed for me too.
The error code displayed was: 105.
This was the first time ever game crashed for me.
I am not verifying integrity of files through steam and am trying to launch Lost Ark again.
EDIT: After integrity check, I was able to launch Lost Ark. I lost Aura of Resonance though, even though I haven’t completed the last floor of the chaos dungeon when the game crashed.