No report of this in known issues at this time.
Platform, device version and operating system
Screenshot or image
What you were expecting to happen, and what actually happened
I was trying to unlock chests. The game gave me an error and shut down.
How often does this happen? When did it begin happening?
Happened after installing the 3.5 update, every time I tried to open a chest. I had 10 event keys and a bunch of gem keys and I don’t know if I got the contents or not.
Steps to make it happen again
See the video. It happens every time I try to unlock one or all chests.