An upgrade tome pops up, the first two upgrades go well, but the third one freezes the game. Happens on both iOS and Android. And the game is updated. Nothing could help and even a GM under Issue ID: #102164895 told me nothing could be done to fix this.
The only way I can temporarily make the game work is to log out and back in and then it works, but the game will be buggy and part of the shop is not working. The moment I close the app and open it again the same happens and the upgrade tome comes up