I am on the latest public version 1.05 and what happened before was that I travelled to the other island with Ayane and went to the other fox shrine and fought Hanako and went through the rest of the feast event. Afterwards, I went back to the first island and synthesized the prophet's garb and formal wear and went to the area with gargoyles to fight for sp. I defeated the first one fine but when i fought the second one the error happened. I maxed out the sp fighting jinkos after i reloaded the game and I did not go back to the gargoyle area.
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.