Czego tyczy ten blad ?

[PanTadeusz]

W logach od jakiegos czasu pokazuje mi sie tylko taki komunikat chcialbym sie dowiedziec wspolnymi silami od czego on jest i dlaczego on wyskakuje ?

(Filename:  Line: -1)
 
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)
<SaveServerRoutine>c__Iterator2:MoveNext()
UnityEngine.Debug:LogException(Exception)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
  at GameSerializer+<SaveServerRoutine>c__Iterator2.MoveNext () [0x00000] in <filename unknown>:0 
  at ItemSerializer.WriteFullItemWithAssetGuid (uLink.BitStream stream, .ItemObject item) [0x00000] in <filename unknown>:0 
  at ItemSerializer.WriteItemBaseline (uLink.BitStream stream, .ItemObject item, Boolean useGuid) [0x00000] in <filename unknown>:0 
  at RuntimeHurtDB.GetAssetDetails (UnityEngine.Object obj) [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.Dictionary`2[UnityEngine.Object,HurtAssetDatabaseRecord].TryGetValue (UnityEngine.Object key, .HurtAssetDatabaseRecord& value) [0x00000] in <filename unknown>:0 
Parameter name: key
ArgumentNullException: Argument cannot be null