I already contacted the support about this once. But it resolved itself by me deleting the world as it was quite a new save.

I've been playing this world couple of weeks. Today, I did all I do normally. Was done playing, tapped menu, Save & Quit. Everything went okay as usual, nothing weird.

I came back 20 minutes later and tapped the world, ready to play again... Nope. When I tap on it, "There was a problem loading this world." The OK button is not working, it makes the animation when I tap on it, but it's not reacting at all. I have to close the game and restart it to get out of the screen.

Now, I've tried some troubleshooting with what people recommended online, but I'm unable to unstuck the world. And I would love to, as there is a lot of hours put into the building up the world...