As the title says - whenever I try to farm magic keep, I get this error:

It started a few days ago, when the keep was open last time. I thought maybe its something temporary, but now the keep is open again and I get the same error.

It usually happens on 2nd battle, but sometimes even on the first one. After this error, I have to restart the game because "Start" button which starts a battle won't work anymore.

As far as I can tell, it always happens on the boss round, when the boss shield is down and the boss health is damaged.

It happens on bluestacks and on the real phone, with or without autoclicker.

My team is: Venus, Skullcrown, Umbral Enchantress, Apothecary, Peydma.