Trying to copy a structure but it keeps giving this error any ideas on a what this is, its also when I try and use the specific file name.

(22:28:16) | Exception while calling NextTick callback (NullReferenceException: )

at (wrapper managed-to-native) UnityEngine.Transform.get_childCount(UnityEngine.Transform)

at UnityEngine.Transform+Enumerator.MoveNext () [0x00001] in <fcaf289839f24125a059795f150fce14>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList (Newtonsoft.Json.JsonWriter writer, System.Collections.IEnumerable values, Newtonsoft.Json.Serialization.JsonArrayContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000e1] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000d4] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008c] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000b0] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerProxy.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type rootType) [0x00008] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Oxide.Core.Configuration.KeyValuesConverter.WriteJson (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.JsonSerializer serializer) [0x0005e] in <b76ec77c47d1449e92b2baab8603843d>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable (Newtonsoft.Json.JsonWriter writer, Newtonsoft.Json.JsonConverter converter, System.Object value, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008a] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00071] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerProxy.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type rootType) [0x00008] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Oxide.Core.Configuration.KeyValuesConverter.WriteJson (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.JsonSerializer serializer) [0x0005e] in <b76ec77c47d1449e92b2baab8603843d>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable (Newtonsoft.Json.JsonWriter writer, Newtonsoft.Json.JsonConverter converter, System.Object value, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008a] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00071] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerProxy.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type rootType) [0x00008] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Oxide.Core.Configuration.KeyValuesConverter.WriteJson (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.JsonSerializer serializer) [0x000a2] in <b76ec77c47d1449e92b2baab8603843d>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable (Newtonsoft.Json.JsonWriter writer, Newtonsoft.Json.JsonConverter converter, System.Object value, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008a] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00071] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerProxy.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type rootType) [0x00008] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Oxide.Core.Configuration.KeyValuesConverter.WriteJson (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.JsonSerializer serializer) [0x0005e] in <b76ec77c47d1449e92b2baab8603843d>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable (Newtonsoft.Json.JsonWriter writer, Newtonsoft.Json.JsonConverter converter, System.Object value, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008a] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00071] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00253] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonConvert.SerializeObjectInternal (System.Object value, System.Type type, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00028] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value, System.Type type, Newtonsoft.Json.Formatting formatting, Newtonsoft.Json.JsonSerializerSettings settings) [0x0000e] in <271c58b7a8684db5a2c92be17a81f252>:0

at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value, Newtonsoft.Json.Formatting formatting, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0

at Oxide.Core.Configuration.DynamicConfigFile.Save (System.String filename) [0x0002c] in <b76ec77c47d1449e92b2baab8603843d>:0

at Oxide.Core.DataFileSystem.GetDatafile (System.String name) [0x0001a] in <b76ec77c47d1449e92b2baab8603843d>:0

at Oxide.Plugins.CopyPaste.CopyLoop (Oxide.Plugins.CopyPaste+CopyData copyData) [0x001e9] in <214259a9daf1432fbb48300deb8c0665>:0

at Oxide.Plugins.CopyPaste+<>c__DisplayClass31_0.<CopyLoop>b__0 () [0x00000] in <214259a9daf1432fbb48300deb8c0665>:0

at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <b76ec77c47d1449e92b2baab8603843d>:0