Error thrown on startup

[Afterthought]

Hi, I get a red error whenever I start the game. Have tried reinstalling, deleting the core folder, and then verifying the files on Steam, but it still shows up. Comes up with no mods.

Code Select Expand

RimWorld 1.0.2282 rev726
Verse.Log:Message(String, Boolean)
RimWorld.VersionControl:LogVersionNumber()
Verse.Root:CheckGlobalInit()
Verse.Root:Start()
Verse.Root_Entry:Start()

Exception loading from System.Xml.XmlElement: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MissingMethodException: Method not found: 'Default constructor not found...ctor() of System.String'.
  at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in <filename unknown>:0
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <filename unknown>:0
  at Verse.DirectXmlToObject.ObjectFromXml[String] (System.Xml.XmlNode xmlRoot, Boolean doPostLoad) [0x00000] in <filename unknown>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at Verse.DirectXmlToObject.ObjectFromXml[ModMetaDataInternal] (System.Xml.XmlNode xmlRoot, Boolean doPostLoad) [0x00000] in <filename unknown>:0


Didn't know how much of the log to include, can include more if needed.

[Afterthought]

Can no-one offer any light at all? I've just been ignoring it, but without knowing anything about what is causing the error, I have no knowledge of what might not be working properly.