Collateral Server Error

Platform, device and operation system
Android, Samsung Tab A

What were you expecting to happen, and what actually happened
Looking at Dungeon rewards, error popped up.

How often does this happen? When did it begin happening?
Only once thus far.

Steps to make it happen again
Unknown, check out dungeon.

Have you experienced this issue since, and is it continuing?

Hi, @Salty , I have not experienced that particular error today, but have 2 other restart errors, both while in a dungeon battle: