I'm not sure if this is it.

Field DubsMintMenus.MintPawns_Gear.PawnRowHeight is marked with TweakValue, but is readonly; TweakValue won't work
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.EditWindow_TweakValues/<FindAllTweakables>d__11:MoveNext ()
System.Linq.Enumerable/SelectEnumerableIterator`2<System.Reflection.FieldInfo, Verse.EditWindow_TweakValues/TweakInfo>:ToArray ()
System.Linq.Buffer`1<Verse.EditWindow_TweakValues/TweakInfo>:.ctor (System.Collections.Generic.IEnumerable`1<Verse.EditWindow_TweakValues/TweakInfo>)
System.Linq.OrderedEnumerable`1<Verse.EditWindow_TweakValues/TweakInfo>:ToList ()
System.Linq.Enumerable:ToList<Verse.EditWindow_TweakValues/TweakInfo> (System.Collections.Generic.IEnumerable`1<Verse.EditWindow_TweakValues/TweakInfo>)
Verse.EditWindow_TweakValues:.ctor ()
Verse.DebugWindowsOpener:ToggleTweakValuesMenu ()
(wrapper dynamic-method) Verse.DebugWindowsOpener:Verse.DebugWindowsOpener.DrawButtons_Patch0 (Verse.DebugWindowsOpener)
Verse.ImmediateWindow:DoWindowContents (UnityEngine.Rect)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)