GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
GUIDToPath: guid is empty
ExType: JsonSerializationException
Exception while calling NextTick callback (NullReferenceException: )
at (wrapper managed-to-native) UnityEngine.MonoBehaviour.get_useGUILayout(UnityEngine.MonoBehaviour)
at System.Reflection.RuntimePropertyInfo.GetterAdapterFrame[T,R] (System.Reflection.RuntimePropertyInfo+Getter`2[T,R] getter, System.Object obj) [0x00000] in <2161c9885dd04ff291b79db9349c4b9b>:0
at System.Reflection.RuntimePropertyInfo.GetValue (System.Object obj, System.Object[] index) [0x00082] in <2161c9885dd04ff291b79db9349c4b9b>:0

this is happening when I try to copy building

Merged post

Was due to file name.