my world is damaged.

I said that... When I try to enter my main survival it stays in "loading terrain" and does not advance, this problem is a bug. Why? Simple, it had never happened to me and also not only happened with that, but I created a new one to try to see if it was the world, and no, it happened with that world too, I need you to help me, and if possible, repair the world to return to it, I had already spent a lot of time