Crashing when loading world

I created this world a couple days ago and at first it loaded up fine in single player and I played it for a while, ever since then when I try to load it up in single player it crashes. When I load up the world in multiplayer, but playing alone, it doesn't crash for some reason and I can play with no obvious issues.

I don't really know all too much about reading crash logs and all that so if I could get some help fixing the crash I'd appreciate it :)

client.log301.55KB