Starting a thread because of character limit for comments. I can confirm I get nonstop errors upon reloading a save. Here's the log. These 2 errors repeat nonstop:

Exception in UIRootUpdate: System.NullReferenceException: Object reference not set to an instance of an object
[Ref D4C5C82D]
at Ideology_Faction_Icon.HarmonyPatches.WorldInterfaceUpdatePrefix () [0x000cf] in <aa19d46363bf4203b5bd9de19602331b>:0
at RimWorld.WorldInterface.WorldInterfaceUpdate () [0x00000] in <630e2863bc9a4a3493f2eff01e3a9556>:0
- PREFIX rimworld.nuff.ideofacticon: Void Ideology_Faction_Icon.HarmonyPatches:WorldInterfaceUpdatePrefix()
at RimWorld.UIRoot_Play.UIRootUpdate () [0x0000b] in <630e2863bc9a4a3493f2eff01e3a9556>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch8 (string)
RimWorld.UIRoot_Play:UIRootUpdate ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root.Update_Patch1 (Verse.Root)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root_Play.Update_Patch1 (Verse.Root_Play)

Error while drawing Settlement Blue Chogarobil (tile=45247): System.NullReferenceException: Object reference not set to an instance of an object
[Ref DF9C58B]
at RimWorld.Planet.Settlement.get_Material () [0x00015] in <630e2863bc9a4a3493f2eff01e3a9556>:0
at RimWorld.Planet.WorldObject.get_ExpandingIconColor () [0x00020] in <630e2863bc9a4a3493f2eff01e3a9556>:0
- POSTFIX VFEInsectoidsMod: Void VFEInsectoids.WorldObject_ExpandingIconColor_Patch:Postfix(WorldObject __instance, Color& __result)
at (wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition.Glue:AbiFixup<UnityEngine.Color RimWorld.Planet.WorldObject:get_ExpandingIconColor(),UnityEngine.Color RimWorld.Planet.WorldObject.get_ExpandingIconColor_Patch1(RimWorld.Planet.WorldObject)>(RimWorld.Planet.WorldObject,UnityEngine.Color&)
at RimWorld.Planet.ExpandableWorldObjectsUtility.ExpandableWorldObjectsOnGUI () [0x000b0] in <630e2863bc9a4a3493f2eff01e3a9556>:0
- TRANSPILER SRTSExpanded.smashphil.neceros: IEnumerable`1 SRTS.StartUp:ExpandableIconDetourSRTSTranspiler(IEnumerable`1 instructions, ILGenerator ilg)
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch8 (string)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:RimWorld.Planet.ExpandableWorldObjectsUtility.ExpandableWorldObjectsOnGUI_Patch0 ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:RimWorld.WorldInterface.WorldInterfaceOnGUI_Patch1 (RimWorld.WorldInterface)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:RimWorld.UIRoot_Play.UIRootOnGUI_Patch4 (RimWorld.UIRoot_Play)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root.OnGUI_Patch2 (Verse.Root)



I haven't been able to pinpoint where Blue Chogarobil comes from.
I have these mods enabled: Vanilla Factions Expanded Insectoids 2, SRTS Expanded, Faction Control, Faction Customizer, among hundreds of others
I don't have Regrowth Expanded World Generation
Isolating the above mods mentioned in the errors and this mod doesn't seem to trigger the error though, so there's some other incompatibility happening somewhere else. I have so many mods loaded at once it's hard to pinpoint which one. I'll try experimenting some more and see if I can figure out where this error is from.