Exception from asynchronous event: System.TypeInitializationException: The type initializer for 'FluffyResearchTree.Assets' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object
[Ref 9E5E5B1C]
<0x2a4ffe629d0 + 0x0038b> <unknown method>
--- End of inner exception stack trace ---
[Ref DC925F73]
(wrapper managed-to-native) System.Object.__icall_wrapper_mono_generic_class_init(intptr)
at FluffyResearchTree.Tree.PopulateNodes () [0x0009b] in <cf458c1860c64b04a118760b101044c3>:0
at FluffyResearchTree.Tree.get_Nodes () [0x00008] in <cf458c1860c64b04a118760b101044c3>:0
at FluffyResearchTree.Tree.ResearchToNode (Verse.ResearchProjectDef research) [0x0001c] in <cf458c1860c64b04a118760b101044c3>:0
at FluffyResearchTree.ResearchProjectDef_Extensions.ResearchNode (Verse.ResearchProjectDef research) [0x00000] in <cf458c1860c64b04a118760b101044c3>:0
at FluffyResearchTree.Queue.TryStartNext (Verse.ResearchProjectDef finished) [0x00000] in <cf458c1860c64b04a118760b101044c3>:0
at FluffyResearchTree.ResearchManager_FinishProject.Postfix (Verse.ResearchProjectDef proj) [0x00004] in <cf458c1860c64b04a118760b101044c3>:0
at RimWorld.ResearchManager.FinishProject (Verse.ResearchProjectDef proj, System.Boolean doCompletionDialog, Verse.Pawn researcher, System.Boolean doCompletionLetter) [0x00563] in <981a33edf24d499488b0f820d94638e1>:0
- PREFIX ProgressionCoreMod: Void ProgressionCore.ResearchManager_FinishProject_Patch:Prefix(Boolean& __state)
- PREFIX Fluffy.ResearchTree: Void FluffyResearchTree.ResearchManager_FinishProject:Prefix(ResearchProjectDef proj, Boolean& doCompletionDialog)
- PREFIX CM_Semi_Random_Research: Void CM_Semi_Random_Research.ResearchManager_Patches+ResearchManager_FinishProject:HarmonyPrefix(ResearchProjectDef proj)
- PREFIX Dubwise.DubsMintMenus: Void DubsMintMenus.HarmonyPatches+Patch_FinishProject:Prefix(Boolean& doCompletionDialog)
- POSTFIX vanillaexpanded.achievements: Void AchievementsExpanded.AchievementHarmony:ResearchProjectFinished(ResearchProjectDef proj, Boolean doCompletionDialog, Pawn researcher)
- POSTFIX ProgressionCoreMod: Void ProgressionCore.ResearchManager_FinishProject_Patch:Postfix(Boolean __state)
- POSTFIX Fluffy.ResearchTree: Void FluffyResearchTree.ResearchManager_FinishProject:Postfix(ResearchProjectDef proj)
- POSTFIX VFETribalsMod: Void VFETribals.ResearchManager_FinishProject_Patch:Postfix(ResearchProjectDef proj)
- POSTFIX Dubwise.DubsMintMenus: Void DubsMintMenus.HarmonyPatches+Patch_FinishProject:Postfix(ResearchProjectDef proj)
- POSTFIX OskarPotocki.VanillaSocialInteractionsExpanded: Void VanillaSocialInteractionsExpanded.FinishProject_Patch:Postfix(ResearchProjectDef proj, Boolean doCompletionDialog, Pawn researcher)
at VFETribals.GameComponent_Tribals.ResearchAllAnimalProjects () [0x00045] in <2454b24e347f44dca0039f9ff0c6fca7>:0
at VFETribals.ScenPart_ConfigPage_ConfigureStartingPawnsBase_PostIdeoChosen_Patch.Prefix () [0x00018] in <2454b24e347f44dca0039f9ff0c6fca7>:0
at RimWorld.ScenPart_ConfigPage_ConfigureStartingPawnsBase.PostIdeoChosen () [0x00000] in <981a33edf24d499488b0f820d94638e1>:0
- PREFIX VFETribalsMod: Void VFETribals.ScenPart_ConfigPage_ConfigureStartingPawnsBase_PostIdeoChosen_Patch:Prefix()
at RimWorld.Scenario.PostIdeoChosen () [0x00014] in <981a33edf24d499488b0f820d94638e1>:0
at HugsLib.Quickstart.QuickstartController.ApplyQuickstartConfiguration () [0x00097] in <e92fb9c535b84355b807623efc376846>:0
at HugsLib.Quickstart.QuickstartController+<>c.<InitiateMapGeneration>b__7_0 () [0x00007] in <e92fb9c535b84355b807623efc376846>:0
at Verse.LongEventHandler.RunEventFromAnotherThread (System.Action action) [0x00008] in <981a33edf24d499488b0f820d94638e1>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch3 (string)
Verse.LongEventHandler:RunEventFromAnotherThread (System.Action)
Verse.LongEventHandler/<>c:<UpdateCurrentAsynchronousEvent>b__28_0 ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()

@nukestar
Can you provide the mod list at the time of the error? I'm quite sure this is an issue with the old code from before.