I was playing on my single player world and my Minecraft crashed when I start Minecraft again the world is not in the list of singleplayer worlds. I checked the world files and the world is in the "saves" folder but it does not show in the list of worlds in game. I then got a Minecraft server to run the world and that worked fine. I dont know what i can do to play on the world in singleplayer and its really annoying to have to start a Minecraft server just to play singleplayer.
Here is the world: https://gofile.io/?c=eAeE3B