Cheers. 
World name : Nemacolin
This is an interesting one. By the looks of things, you're missing a few Terrain defs, I'll see what I can do about Reproing this from home later.
Edit : Is this a fresh install?
Edit : Have you wiped your old Appdata folder?
Edit : Might suggest redownloading and see if that fixes it.

World name : Nemacolin
Code Select
(Filename: C:/buildslave/unity/build/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 56)
Did not find terrain def with short hash 34466 for cell (0, 0, 0).
(Filename: C:/buildslave/unity/build/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 56)
A few times
Map compressor decompression error: No thingDef with short hash 11384. Adding as null to dictionary.
(Filename: C:/buildslave/unity/build/artifacts/StandalonePlayerGenerated/UnityEngineDebug.cpp Line: 56)
Exception from asynchronous event: System.NullReferenceException: Object reference not set to an instance of an object
at Verse.ThingMaker.MakeThing (Verse.ThingDef def, Verse.ThingDef stuff) [0x00000] in <filename unknown>:0
at Verse.MapFileCompressor+<ThingsToSpawnAfterLoad>c__Iterator158.MoveNext () [0x00000] in <filename unknown>:0
at System.Collections.Generic.List`1[Verse.Thing].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0
at System.Collections.Generic.List`1[Verse.Thing]..ctor (IEnumerable`1 collection) [0x00000] in <filename unknown>:0
at System.Linq.Enumerable.ToList[Thing] (IEnumerable`1 source) [0x00000] in <filename unknown>:0
at Verse.MapIniter_LoadFromFile.InitMapFromFile (System.String fileName) [0x00000] in <filename unknown>:0
at Verse.RootMap.<Init>m__513 () [0x00000] in <filename unknown>:0
at Verse.LongEventHandler.RunEventFromAnotherThread (System.Action action) [0x00000] in <filename unknown>:0 This is an interesting one. By the looks of things, you're missing a few Terrain defs, I'll see what I can do about Reproing this from home later.
Edit : Is this a fresh install?
Edit : Have you wiped your old Appdata folder?
Edit : Might suggest redownloading and see if that fixes it.

