So I was playing my 3 year old Minecraft world and my laptop's battery ran out. The laptop shut down with the world running; however, when I try to play the world now, it gives me this phrase "There was a problem loading this world". I used to play perfectly fine in this world but now I can't play it. I don't want to loose all the progress that was done there. If its a bug please fix it, but if it isn't, please help me to fix it. I checked YouTube and my world just gets chunk errors and cuts off buildings.