I'm afraid it's not an option for the Android platform. Well, I'll run more tests but tech-wise your first encounter with gargoyles isn't any different from the second one. The function from error text is checking which options are available to the player and it's common for all battles.
It's the first time I see this error after hours of gameplay both on my side and other players. It looks like a weird screw-up on RPG Maker's side but I'll double-check the logic for mobile devices.