Are you currently receiving the 15 gems for 15 days bundle? That used to happen to me on Android, but now doesn’t and I suspect it’s due to the fact that I was receiving the daily gems and currently I am not.
I was receiving the gems bundle up till a few days ago. However, when I opened the Google Play Store, it was showing up as if I didn’t have an Internet connection. I rebooted the phone and both Google Play Store and the Gems of War Store worked.
Either way, my main concern is that I have to restart the game instead of just being able to dismiss the error.
But if this error keeps happening in the future, my main concern may change…