Goblin Upgrade Bug

Hello there,

In game I need to upgrade a Goblin (that which we get at second mission) but, when I’m gonna upgrade I can’t click on upgrade button and then game is nearly to “freezing” effect(I mean i can’t go out or even upgrade him, all I can do is restart game). In addition I can upgrade cards as well goblin card.

Make sure you have 6 copies of the goblin in order to ascend him.