Hitting escape and trying again fixed things every time
That XML formatting is gorgeous.
You’re using actual HTML tags to communicate? I haven’t leveraged JSON but I thought it would just be XML messages and not a full HTML, head and body tags. Seems weird to communicate data…
I’ve received a very similar message, but for me it happens after I win a match. I have to restart the app, running on Android LG 2.
I wonder if a server is down, improperly reset, or something like that?
Second error happend to me just a minute ago.
Occasionally these errors result from communication issues. If you’re missing anything due to it, drop us a message in support 
https://gemsofwar.zendesk.com/hc/en-us
I kept at it and kept carefull watch. It was returning the key to me each time, so didn’t lose anything.