We were notified that several users were still experiencing crashing when finding an Octavia ruin today 29th December.
This is due to Octavia's skill usage as this generates various lagging.
The issue has been identified, however, it will take some time to fix.
So until then, we recommend you to turn off 'Skill Animation' when playing.
You will be able to experience more stabilized battles when the skill display has been turned off.