I recceive the following error message when I load the game with this mod. When I disable the mod, this error is gone:
[object Object]
NullReferenceException: Object reference not set to an instance of an object
at Colossal.IO.AssetDatabase.PrefabAsset+PrefabReferenceResolver.TryResolveReference (System.String id, System.Object& value) [0x00052] in <57b5f3e4302043fda596a7ba689e15a7>:0
at Colossal.OdinSerializer.DeserializationContext.GetExternalObject (System.String id) [0x00033] in <5fbd906329d843a4a9e7066a41ace735>:0
at Colossal.OdinSerializer.AnySerializer.ReadValueWeak (Colossal.OdinSerializer.IDataReader reader) [0x006df] in <5fbd906329d843a4a9e7066a41ace735>:0
at Colossal.OdinSerializer.ReflectionFormatter`1[T].DeserializeImplementation (T& value, Colossal.OdinSerializer.IDataReader reader) [0x0013d] in <5fbd906329d843a4a9e7066a41ace735>:0
Colossal.Logging.CustomLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception)
Colossal.OdinSerializer.CustomLogger:LogException(Exception)
Colossal.OdinSerializer.DebugContext:LogException(Exception)
Colossal.OdinSerializer.ReflectionFormatter`1

eserializeImplementation(UIObject&, IDataReader)
Colossal.OdinSerializer.BaseFormatter`1

eserialize(IDataReader)
Colossal.OdinSerializer.BaseFormatter`1:Colossal.OdinSerializer.IFormatter.Deserialize(IDataReader)
Colossal.OdinSerializer.ComplexTypeSerializer`1:ReadValue(IDataReader)
Colossal.OdinSerializer.ListFormatter`1

eserializeImplementation(List`1&, IDataReader)
Colossal.OdinSerializer.BaseFormatter`1

eserialize(IDataReader)
Colossal.OdinSerializer.BaseFormatter`1:Colossal.OdinSerializer.IFormatter.Deserialize(IDataReader)
Colossal.OdinSerializer.AnySerializer:ReadValueWeak(IDataReader)
Colossal.OdinSerializer.ReflectionFormatter`1

eserializeImplementation(StaticObjectPrefab&, IDataReader)
Colossal.OdinSerializer.BaseFormatter`1

eserialize(IDataReader)
Colossal.OdinSerializer.BaseFormatter`1:Colossal.OdinSerializer.IFormatter.Deserialize(IDataReader)
Colossal.OdinSerializer.AnySerializer:ReadValueWeak(IDataReader)
Colossal.OdinSerializer.SerializationUtility

eserializeValueWeak(IDataReader)
Colossal.OdinSerializer.SerializationUtility

eserializeValueWeak(Stream, DataFormat, DeserializationContext)
Colossal.IO.AssetDatabase.PrefabAsset:Load()
Game.SceneFlow.GameManager:LoadPrefabs()
Game.SceneFlow.<Initialize>d__60:MoveNext()
System.Runtime.CompilerServices.MoveNextRunner:InvokeMoveNext(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Runtime.CompilerServices.MoveNextRunner:Run()
System.Threading.Tasks.<>c:<.cctor>b__7_0(Object)
UnityEngine.WorkRequest:Invoke()
UnityEngine.UnitySynchronizationContext:Exec()
UnityEngine.UnitySynchronizationContext:ExecuteTasks()