Not sure what is causing this, but I think it has to do with some mod adding a stat that isn't being read properly. There are a number of stats influencing mods, so maybe one of them isn't playing nice.

If anyone knows more. Here's a fun log line:

Exception filling window for Verse.Dialog_InfoCard: System.NullReferenceException: Object reference not set to an instance of an object
[Ref 86AB41A4]
at RimWorld.IngestionOutcomeDoer_GiveHediff+<SpecialDisplayStats>d__6.MoveNext () [0x00049] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
at RimWorld.IngestibleProperties+<SpecialDisplayStats>d__45.MoveNext () [0x00229] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
at Verse.ThingDef+<SpecialDisplayStats>d__404.MoveNext () [0x01908] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
at VEF.Apparels.VanillaExpandedFramework_ThingDef_SpecialDisplayStats_Patch+<Postfix>d__0.MoveNext () [0x00094] in <779cd629564f4c29b4f0c3bcbfa93b60>:0
at System.Collections.Generic.List`1[T].AddEnumerable (System.Collections.Generic.IEnumerable`1[T] enumerable) [0x00059] in <51fded79cd284d4d911c5949aff4cb21>:0
at System.Collections.Generic.List`1[T].InsertRange (System.Int32 index, System.Collections.Generic.IEnumerable`1[T] collection) [0x000f4] in <51fded79cd284d4d911c5949aff4cb21>:0
at System.Collections.Generic.List`1[T].AddRange (System.Collections.Generic.IEnumerable`1[T] collection) [0x00000] in <51fded79cd284d4d911c5949aff4cb21>:0
at RimWorld.StatsReportUtility.DrawStatsReport (UnityEngine.Rect rect, Verse.Thing thing) [0x00066] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
- PREFIX OskarPotocki.VEF: Void VEF.Weapons.VanillaExpandedFramework_StatsReportUtility_DrawStatsReport_Patch:Prefix(Rect rect, Thing thing, List`1& __state)
- POSTFIX OskarPotocki.VEF: Void VEF.Weapons.VanillaExpandedFramework_StatsReportUtility_DrawStatsReport_Patch:Postfix(List`1 __state)
at Verse.Dialog_InfoCard.FillCard (UnityEngine.Rect cardRect) [0x00064] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
- PREFIX OskarPotocki.VEF: Boolean VEF.AnimalBehaviours.VanillaExpandedFramework_Dialog_InfoCard_FillCard_Patch:Prefix(Rect cardRect, Dialog_InfoCard __instance, Thing ___thing, InfoCardTab ___tab)
at Verse.Dialog_InfoCard.DoWindowContents (UnityEngine.Rect inRect) [0x0029f] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in <78f29a4eb9bd4773be28b9eaaf6c5df6>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch1 (string)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)