After my pet lost a battle it reloaded the page to where it should show the big portal, but instead this happened. I think that is the border of the island screen, but it's just a black box on the inside.

Thanks for reporting!

Maybe it was a hardware problem with our server. We have another problem reported with islands at the same time which we can't reproduce. Please say if you will face this problem again.

Sorry for the inconvenience.