Exception filling window for RimWorld.Dialog_ManageOutfits: System.NullReferenceException: Object reference not set to an instance of an object
at Multiplayer.API.MP.get_IsInMultiplayer () <0x0000a>
at Outfitted.Dialog_ManageOutfits_DoWindowContents_Patch.Postfix (UnityEngine.Rect,RimWorld.Outfit) <0x0023b>
at (wrapper dynamic-method) RimWorld.Dialog_ManageOutfits.DoWindowContents_Patch4 (object,UnityEngine.Rect) <0x01049>
at Verse.Window/<WindowOnGUI>c__AnonStorey0.<>m__0 (int) <0x00882>

Verse.Log:Error(String, Boolean)
Verse.<WindowOnGUI>c__AnonStorey0:<>m__0(Int32)
UnityEngine.GUI:CallWindowDelegate(WindowFunction, Int32, Int32, GUISkin, Int32, Single, Single, GUIStyle)

https://cdn.discordapp.com/attachments/511903935259213835/592323790692810773/unknown.png

Since the last update:
-The "Close" button is half hidden
-The Outfitted UI isn't appering anymore
-I can't select an another outfit with the list, the button isn't working
-The last update seems to be with Multiplayer API, I have an older version of thne multiplayer mod unziped inside my core. So, the multiplayer isn't considered as a mod, but a sort of additionnal content to the game, wich is still active. But im in single player. Anyone know how i can remove it from my game ?
Is it related with my bug ?
I can't change anything anymore :(