Here is the end of the file after I started the game up and went into the world and then exited after it popped up a number of times.
Platform assembly: C:\Games\7DtD War of the Walkers\7DaysToDie_Data\Managed\System.Configuration.dll (this message is harmless)
Platform assembly: C:\Games\7DtD War of the Walkers\7DaysToDie_Data\Managed\Mono.Security.dll (this message is harmless)
2016-11-27T23:59:36 37.050 INF [steamworks.NET] GameServer.Init successful
2016-11-27T23:59:36 37.071 INF ************************Weather Packages Created FROM BIOMES ************************
2016-11-27T23:59:38 38.596 INF [steamworks.NET] Create Lobby
2016-11-27T23:59:38 38.598 INF [steamworks.NET] GameServer.LogOn successful
2016-11-27T23:59:38 38.798 INF [steamworks.NET] Lobby creation succeeded
2016-11-27T23:59:38 38.803 INF [steamworks.NET] Lobby entered: 109775243771727234
NullReferenceException: Object reference not set to an instance of an object
at EntityNPC.OnUpdateLive () [0x00000] in <filename unknown>:0
at EntityAlive.OnUpdateEntity () [0x00000] in <filename unknown>:0
at World.TickEntities (Single _partialTicks) [0x00000] in <filename unknown>:0
at GameManager.Update () [0x00000] in <filename unknown>:0
(Filename: Line: -1)
NullReferenceException: Object reference not set to an instance of an object
at EntityNPC.OnUpdateLive () [0x00000] in <filename unknown>:0
at EntityAlive.OnUpdateEntity () [0x00000] in <filename unknown>:0
at World.TickEntities (Single _partialTicks) [0x00000] in <filename unknown>:0
at GameManager.Update () [0x00000] in <filename unknown>:0
(Filename: Line: -1)
NullReferenceException: Object reference not set to an instance of an object
at EntityNPC.OnUpdateLive () [0x00000] in <filename unknown>:0
at EntityAlive.OnUpdateEntity () [0x00000] in <filename unknown>:0
at World.TickEntities (Single _partialTicks) [0x00000] in <filename unknown>:0
at GameManager.Update () [0x00000] in <filename unknown>:0
(Filename: Line: -1)
NullReferenceException: Object reference not set to an instance of an object
at EntityNPC.OnUpdateLive () [0x00000] in <filename unknown>:0
at EntityAlive.OnUpdateEntity () [0x00000] in <filename unknown>:0
at World.TickEntities (Single _partialTicks) [0x00000] in <filename unknown>:0
at GameManager.Update () [0x00000] in <filename unknown>:0
(Filename: Line: -1)
2016-11-28T00:00:06 66.938 INF Time: 0.61m FPS: 21.95 Heap: 501.1MB Max: 501.1MB Chunks: 529 CGO: 426 Ply: 1 Zom: 10 Ent: 18 (18) Items: 0 CO: 1
2016-11-28T00:00:06 67.459 INF Saving 201 of chunks took 324ms
2016-11-28T00:00:09 70.382 INF Disconnect
2016-11-28T00:00:09 70.388 INF NET: Stopping server protocols
2016-11-28T00:00:09 70.395 INF NET: UNET server stopped
2016-11-28T00:00:09 70.436 INF NET: Untiy NW server stopped
2016-11-28T00:00:09 70.436 INF [steamworks.NET] NET: Server stopped
2016-11-28T00:00:09 70.437 INF [NET] ServerShutdown
2016-11-28T00:00:09 70.437 INF SaveAndCleanupWorld
2016-11-28T00:00:10 70.843 INF Saving 200 of chunks took 281ms
2016-11-28T00:00:10 70.846 INF [steamworks.NET] Stopping server
2016-11-28T00:00:10 70.900 INF World.Unload
2016-11-28T00:00:10 71.192 INF Exited thread thread_GenerateChunks
2016-11-28T00:00:10 71.417 INF Exited thread thread_Pathfinder
2016-11-28T00:00:10 71.418 INF World.Cleanup
2016-11-28T00:00:10 71.443 INF Exited thread thread_Regenerating
2016-11-28T00:00:10 71.444 INF Exited thread EU
2016-11-28T00:00:12 73.452 INF Persistent GamePrefs saved
2016-11-28T00:00:12 73.453 INF Cleanup
2016-11-28T00:00:12 73.455 WRN Missing cleanup for XML: sounds
2016-11-28T00:00:13 73.750 INF OnApplicationQuit
If you need more, let me know.
EDIT - It started right after I dug up some clay. Until then, the game was running fine.