World isn't generate (2)

Hi, I have a problem.
There is such a small problem in my world. When I load it, it breaks down somehow, i.e. when I load it, it doesn't finish because there is such a small square world and only on it I can walk and if I want to continue, the game limits me and I can't go through it, and if I want to, it slows me down and I can't go any further, here you have a screen