I have just tried it on my Android quickly, and I do not get the error that you mention. Also, I don't know if it's specific with any character or in general.
PC, tried both through the itch.io app and on it's own with just downloading it. It just doesn't load at all so it's not a specific character. I click on mating mode and the menu options disappear and it shows the title background, even let it sit for a minute or two and still nothing.
