Hey guys. We investigated this issue today and found that it seems to be caused by the mod HugsLib. The related error message is
Exception filling window for RimWorld.Dialog_Options: System.NullReferenceException: Object reference not set to an instance of an object
at (wrapper dynamic-method) RimWorld.Dialog_Options.RimWorld.Dialog_Options.DoModOptions_Patch0(RimWorld.Dialog_Options,Verse.Listing_Standard)
at RimWorld.Dialog_Options.DoOptions (Verse.OptionCategoryDef category, UnityEngine.Rect inRect) [0x0015e] in D:\dev\unity\rimworld\Assets\Scripts\RimWorld\UI\Dialogs\Dialog_Options.cs:189
at RimWorld.Dialog_Options.DoWindowContents (UnityEngine.Rect inRect) [0x00109] in D:\dev\unity\rimworld\Assets\Scripts\RimWorld\UI\Dialogs\Dialog_Options.cs:123
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x0023e] in D:\dev\unity\rimworld\Assets\Scripts\Verse\UI\Windows\Window.cs:247
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