Upon creating a ferian in prepare carefully, this error pops up. The tail is missing.

Error rendering pawn portrait: Value cannot be null.
Parameter name: key
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.PawnRenderer:RenderCache (Verse.Rot4,single,UnityEngine.Vector3,bool,bool,bool,bool,bool,System.Collections.Generic.Dictionary`2<RimWorld.Apparel, UnityEngine.Color>,System.Nullable`1<UnityEngine.Color>,bool)
RimWorld.PawnCacheRenderer:OnPostRender ()
(wrapper dynamic-method) RimWorld.PawnCacheRenderer:RimWorld.PawnCacheRenderer.RenderPawn_Patch1 (RimWorld.PawnCacheRenderer,Verse.Pawn,UnityEngine.RenderTexture,UnityEngine.Vector3,single,single,Verse.Rot4,bool,bool,bool,bool,bool,UnityEngine.Vector3,System.Collections.Generic.Dictionary`2<RimWorld.Apparel, UnityEngine.Color>,System.Nullable`1<UnityEngine.Color>,bool)
RimWorld.PortraitsCache:RenderPortrait (Verse.Pawn,UnityEngine.RenderTexture,UnityEngine.Vector3,single,Verse.Rot4,bool,bool,System.Collections.Generic.Dictionary`2<RimWorld.Apparel, UnityEngine.Color>,System.Nullable`1<UnityEngine.Color>,bool)
RimWorld.PortraitsCache:Get (Verse.Pawn,UnityEngine.Vector2,Verse.Rot4,UnityEngine.Vector3,single,bool,bool,bool,bool,System.Collections.Generic.Dictionary`2<RimWorld.Apparel, UnityEngine.Color>,System.Nullable`1<UnityEngine.Color>,bool)
EdB.PrepareCarefully.CustomPawn:GetPortrait (UnityEngine.Vector2)
EdB.PrepareCarefully.PanelPawnList:DrawPanelContent (EdB.PrepareCarefully.State)
EdB.PrepareCarefully.PanelBase:Draw (EdB.PrepareCarefully.State)
EdB.PrepareCarefully.TabViewPawns:Draw (EdB.PrepareCarefully.State,UnityEngine.Rect)
EdB.PrepareCarefully.Page_PrepareCarefully:DoWindowContents (UnityEngine.Rect)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)