is that a mod feature xd

Exception while saving game: System.InvalidOperationException: The Writer is closed or in error state.
at System.Xml.XmlWellFormedWriter.AdvanceState (System.Xml.XmlWellFormedWriter+Token token) [0x00028] in <0f9699188f0c414ea6fb5557f5c16d15>:0
at System.Xml.XmlWellFormedWriter.WriteEndElement () [0x000b8] in <0f9699188f0c414ea6fb5557f5c16d15>:0
at Verse.ScribeSaver.ExitNode () [0x0001f] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.Scribe.ExitNode () [0x00008] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.Scribe_Deep.Look[T] (T& target, System.Boolean saveDestroyedThings, System.String label, System.Object[] ctorArgs) [0x001a2] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.Scribe_Deep.Look[T] (T& target, System.String label, System.Object[] ctorArgs) [0x00000] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.GameDataSaveLoader+<>c.<SaveGame>b__28_0 () [0x00017] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.SafeSaver.DoSave (System.String fullPath, System.String documentElementName, System.Action saveAction) [0x00058] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.SafeSaver.Save (System.String path, System.String documentElementName, System.Action saveAction, System.Boolean leaveOldFile) [0x00186] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.GameDataSaveLoader.SaveGame (System.String fileName) [0x0002f] in <cd7169108ea74757aa50c5b33d275c15>:0
(Filename: C:\buildslave\unity\build\Runtime/Export/Debug/Debug.bindings.h Line: 39)