Apparently I only had 1/2 the mod installed. Who knows what happened? (Obviously User Error)
I re-downloaded AllowTool and everything works fine now.

Hi!
Not sure if I need to post this here or over at AllowTool GitHub (And yes, this is an almost exact copy of my Bug Report over there). But, in the case that this is the correct area to post errors, here is what I'm getting every time.
(For the record, if I ignore the error and go straight into the game, AllowTool offers no tools at all.)

WITH OTHER MODS:
[HugsLib][ERR]` AllowTool caused an exception during OnGUI: System.NullReferenceException: Object reference not set to an instance of an object
at AllowTool.HotKeyHandler.CheckForHotkeyPresses () [0x00021] in :0
at AllowTool.HotKeyHandler.OnGUI () [0x00013] in :0
at AllowTool.AllowToolController.OnGUI () [0x00001] in :0
at HugsLib.HugsLibController.OnGUI () [0x00043] in <4a46802aeab646ab99159f7eecb6b57e>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
HugsLib.Utils.ModLogger:ReportException (System.Exception,string,bool,string)
HugsLib.HugsLibController:OnGUI ()
HugsLib.Patches.UIRoot_OnGUI_Patch:OnGUIHook ()
(wrapper dynamic-method) Verse.UIRoot:Verse.UIRoot.UIRootOnGUI_Patch2 (Verse.UIRoot)
(wrapper dynamic-method) RimWorld.UIRoot_Play:RimWorld.UIRoot_Play.UIRootOnGUI_Patch1 (RimWorld.UIRoot_Play)
(wrapper dynamic-method) Verse.Root:Verse.Root.OnGUI_Patch1 (Verse.Root)

WITHOUT OTHER MODS:
System.TypeInitializationException: The type initializer for 'AllowTool.AllowThingToggleHandler' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object
at AllowTool.Designator_DefBased.UseDesignatorDef (AllowTool.ThingDesignatorDef def) [0x00009] in :0
at AllowTool.Designator_Allow..ctor () [0x00013] in :0
at AllowTool.AllowThingToggleHandler..cctor () [0x00000] in :0
--- End of inner exception stack trace ---
at AllowTool.Patches.CompForbiddable_Gizmos_Patch.InjectDesignatorFunctionality (System.Collections.Generic.IEnumerable1[Verse.Gizmo]& __result) [0x00013] in <d3e3fec3eced4dceb8190139680bcabd>:0 at (wrapper dynamic-method) RimWorld.CompForbiddable.RimWorld.CompForbiddable.CompGetGizmosExtra_Patch1(RimWorld.CompForbiddable) at Verse.ThingWithComps+<GetGizmos>d__33.MoveNext () [0x000b2] in <f4c3e52a3fec4807a874d50b5e1c361f>:0 at System.Collections.Generic.List1[T].InsertRange (System.Int32 index, System.Collections.Generic.IEnumerable1[T] collection) [0x000db] in <eae584ce26bc40229c1b1aa476bfa589>:0 at System.Collections.Generic.List1[T].AddRange (System.Collections.Generic.IEnumerable1[T] collection) [0x00000] in <eae584ce26bc40229c1b1aa476bfa589>:0 at (wrapper dynamic-method) RimWorld.InspectGizmoGrid.RimWorld.InspectGizmoGrid.DrawInspectGizmoGridFor_Patch0(System.Collections.Generic.IEnumerable1,Verse.Gizmo&) currentSelectable: Silver14635
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Log:ErrorOnce (string,int)
(wrapper dynamic-method) RimWorld.InspectGizmoGrid:RimWorld.InspectGizmoGrid.DrawInspectGizmoGridFor_Patch0 (System.Collections.Generic.IEnumerable`1,Verse.Gizmo&)
RimWorld.MainTabWindow_Inspect:DrawInspectGizmos ()
RimWorld.InspectPaneUtility:ExtraOnGUI (RimWorld.IInspectPane)
RimWorld.MainTabWindow_Inspect:ExtraOnGUI ()
Verse.WindowStack:WindowStackOnGUI ()
RimWorld.UIRoot_Play:UIRootOnGUI ()
(wrapper dynamic-method) Verse.Root:Verse.Root.OnGUI_Patch1 (Verse.Root)