Another HookGen problem, this time in a new place?

NullReferenceException: Unexpected null in System.Void GameSelectionPanel::Display(System.Boolean,System.String,System.Int32,GameSelectionPanel/GameSelectionFinishedHandler) @ IL_045d: call !0 System.Collections.Generic.List`1/Enumerator<Amplitude.StaticString>::get_Current()
Stack trace:
MonoMod.Utils.DynamicMethodDefinition._GenerateEmit (System.Reflection.MethodBase _mb, System.Reflection.Emit.ILGenerator il)
MonoMod.Utils.DynamicMethodDefinition.GenerateViaDynamicMethod ()
MonoMod.Utils.DynamicMethodDefinition.Generate (System.Object context)
MonoMod.Utils.DynamicMethodDefinition.Generate ()
MonoMod.RuntimeDetour.Platforms.DetourRuntimeILPlatform.CreateCopy (System.Reflection.MethodBase method)
MonoMod.RuntimeDetour.DetourHelper.CreateILCopy (System.Reflection.MethodBase method)
MonoMod.RuntimeDetour.Detour..ctor (System.Reflection.MethodBase from, System.Reflection.MethodBase to)
MonoMod.RuntimeDetour.Hook..ctor (System.Reflection.MethodBase from, System.Reflection.MethodInfo to, System.Object target)
MonoMod.RuntimeDetour.Hook..ctor (System.Reflection.MethodBase method, System.Delegate to)
MonoMod.RuntimeDetour.HookGen.HookEndpoint.Add (System.Delegate hookDelegate)
MonoMod.RuntimeDetour.HookGen.HookEndpointManager.Add (System.Reflection.MethodBase method, System.Delegate hookDelegate)
MonoMod.RuntimeDetour.HookGen.HookEndpointManager.Add[hook_Display] (System.Reflection.MethodBase method, System.Delegate hookDelegate)
On.GameSelectionPanel.add_Display (On.hook_Display )
ManyHeroes_Mod.ManyHeroesMod.OnLoad ()
ManyHeroes_Mod.ManyHeroesMod.Awake ()
UnityEngine.GameObject:AddComponent(Type)
BepInEx.Bootstrap.Chainloader:Start()
UnityEngine.SendMouseEvents:DoSendMouseEvents(Int32, Int32)