I keep getting this error when loading this mod. I tried removing all my other mods and checking my game files using steam. Nothing I do seems to help. If anyone knows what I might do, any help is greatly appreciated! Here is the error:

A Mod caused an error [System.Exception]

Details:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeLoadException: Could not load type 'System.Xml.Serialization.XmlRootAttribute' from assembly 'System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
at NaturalResourcesBrush.OptionsFramework.OptionsWrapper`1[NaturalResourcesBrush.Options].ReadOptionsFile (System.String fileName) [0x00000] in <filename unknown>:0
at NaturalResourcesBrush.OptionsFramework.OptionsWrapper`1[NaturalResourcesBrush.Options].LoadOptions () [0x00000] in <filename unknown>:0
at NaturalResourcesBrush.OptionsFramework.OptionsWrapper`1[NaturalResourcesBrush.Options].Ensure () [0x00000] in <filename unknown>:0
at NaturalResourcesBrush.OptionsFramework.OptionsWrapper`1[NaturalResourcesBrush.Options].get_Options () [0x00000] in <filename unknown>:0
at NaturalResourcesBrush.OptionsFramework.Extensions.UIHelperBaseExtensions.AddOptionsGroup[Options] (UIHelperBase helper, System.Func`2 translator) [0x00000] in <filename unknown>:0
at NaturalResourcesBrush.Mod.OnSettingsUI (UIHelperBase helper) [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception