Border bug and world are became unopenable

Still having unopenable world and its now are currently on half of my total world ia unopenable and before its was unopenable the world have some bug that can make an invisible border but its not the world edge, its generated at X : 200 Y : 64 Z : 600 it were very strange because i cannot move Freely on the world and then its unopenable again and maybe the CURRENT and MANIFEST file are error