Server crashes

Spawning 59439 entities from map
        done.
Postprocessing 59439 entities from map
Setting parent to entity that hasn't spawned yet! (net is null)
NullReferenceException: Object reference not set to an instance of an object.
  at BaseEntity.SetParent (BaseEntity entity, System.UInt32 boneID, System.Boole
an worldPositionStays, System.Boolean sendImmediate) [0x0013a] in <e86ab4ffe0b94
d3ba7333e9531326031>:0 
  at BaseEntity.SetParent (BaseEntity entity, System.Boolean worldPositionStays,
 System.Boolean sendImmediate) [0x00000] in <e86ab4ffe0b94d3ba7333e9531326031>:0
 
  at MicrophoneStand.SpawnChildEntity () [0x0003e] in <e86ab4ffe0b94d3ba7333e953
1326031>:0 
  at MicrophoneStand.PostMapEntitySpawn () [0x00011] in <e86ab4ffe0b94d3ba7333e9
531326031>:0 
  at SaveRestore.SpawnMapEntities (System.Collections.Generic.List`1[T] entities
) [0x000a4] in <e86ab4ffe0b94d3ba7333e9531326031>:0 
  at ServerMgr.Initialize (System.Boolean loadSave, System.String saveFile, Syst
em.Boolean allowOutOfDateSaves, System.Boolean skipInitialSpawn) [0x0008b] in <e
86ab4ffe0b94d3ba7333e9531326031>:0 
  at Bootstrap+<StartServer>d__21.MoveNext () [0x00325] in <e86ab4ffe0b94d3ba733
3e9531326031>:0 
  at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator e
numerator, System.IntPtr returnValueAddress) [0x00026] in <935634f5cc14479dbaa30
641d55600a9>:0 

NullReferenceException: Object reference not set to an instance of an object
  at GroundVehicle.get_CurEngineState () [0x00000] in <e86ab4ffe0b94d3ba7333e953
1326031>:0 
  at ModularCar.RefreshEngineState () [0x00000] in <e86ab4ffe0b94d3ba7333e953132
6031>:0 
  at ModularCar.OnFlagsChanged (BaseEntity+Flags old, BaseEntity+Flags next) [0x
0000d] in <e86ab4ffe0b94d3ba7333e9531326031>:0 
  at BaseEntity.SetFlag (BaseEntity+Flags f, System.Boolean b, System.Boolean re
cursive, System.Boolean networkupdate) [0x0003d] in <e86ab4ffe0b94d3ba7333e95313
26031>:0 
  at BaseVehicle.UpdateMountFlags () [0x00025] in <e86ab4ffe0b94d3ba7333e9531326
031>:0 
  at BaseModularVehicle.ModuleEntityAdded (BaseVehicleModule addedModule) [0x001
d0] in <e86ab4ffe0b94d3ba7333e9531326031>:0 
  at ModularCar.ModuleEntityAdded (BaseVehicleModule addedModule) [0x00000] in <
e86ab4ffe0b94d3ba7333e9531326031>:0 
  at BaseModularVehicle+<>c__DisplayClass48_0.<OnChildAdded>b__0 () [0x00000] in
 <e86ab4ffe0b94d3ba7333e9531326031>:0 
  at InvokeHandlerBase`1[T].DoTick () [0x00138] in <0fb5ef065c904f82ba12d61dc841
11dd>:0 
  at InvokeHandlerBase`1[T].LateUpdate () [0x0000c] in <0fb5ef065c904f82ba12d61d
c84111dd>:0 

After deleting and wiping the base Data file, the error no longer occurs after restarting the server.

However, when I put the base Data file back and start the server, the saved data is corrupted.

Hello, 

I looked into the issue trying to figure out what could be the problem. But unfortunately i do not have that knowledge [I just build the bases not really technicaly advanced myself].

Basing on not having other support tickets about the file i could only assume its a problem with diffrent plugin or server settings on serverr not being compatible with my bases.

I could suggest opening a ticket with the Codefling support center, sorry i cant be much of a help but im simply lacking the knowledge