here is my error report from Rimworld

Could not execute post-long-event action. Exception: System.TypeInitializationException: The type initializer for 'AssembleWeapon.Main' threw an exception. ---> System.Exception: Parameter "hitThing" not found in method virtual System.Void WarframeMAV.Skills.Ashs.Bullet_1Ash::Impact(Verse.Thing hitThingf)
at HarmonyLib.MethodPatcher.EmitCallParameter (System.Reflection.MethodInfo patch, System.Collections.Generic.Dictionary`2[TKey,TValue] variables, System.Boolean allowFirsParamPassthrough) [0x00539] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.MethodPatcher+<>c__DisplayClass32_0.<AddPostfixes>b__1 (System.Reflection.MethodInfo fix) [0x0001d] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.CollectionExtensions.Do[T] (System.Collections.Generic.IEnumerable`1[T] sequence, System.Action`1[T] action) [0x00014] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.MethodPatcher.AddPostfixes (System.Collections.Generic.Dictionary`2[TKey,TValue] variables, System.Boolean passthroughPatches) [0x00039] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.MethodPatcher.CreateReplacement (System.Collections.Generic.Dictionary`2[System.Int32,HarmonyLib.CodeInstruction]& finalInstructions) [0x00283] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.PatchFunctions.UpdateWrapper (System.Reflection.MethodBase original, HarmonyLib.PatchInfo patchInfo) [0x00057] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.PatchProcessor.Patch () [0x000de] in <2161c8330234450b8141397c32c11571>:0
at HarmonyLib.Harmony.Patch (System.Reflection.MethodBase original, HarmonyLib.HarmonyMethod prefix, HarmonyLib.HarmonyMethod postfix, HarmonyLib.HarmonyMethod transpiler, HarmonyLib.HarmonyMethod finalizer) [0x00028] in <2161c8330234450b8141397c32c11571>:0
at AssembleWeapon.Main..cctor () [0x00246] in <e7221498869c48dda1bf2f9ab271b110>:0
--- End of inner exception stack trace ---
at (wrapper managed-to-native) System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor(intptr)
at System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor (System.RuntimeTypeHandle type) [0x0002a] in <567df3e0919241ba98db88bec4c6696f>:0
at Verse.StaticConstructorOnStartupUtility.CallAll () [0x00018] in <65f126dfb1e4464fa378d4b237f11a99>:0
at Verse.PlayDataLoader+<>c.<DoPlayLoad>b__4_2 () [0x0000a] in <65f126dfb1e4464fa378d4b237f11a99>:0
at Verse.LongEventHandler.ExecuteToExecuteWhenFinished () [0x0007d] in <65f126dfb1e4464fa378d4b237f11a99>:0
Verse.Log:Error(String, Boolean)
Verse.LongEventHandler:ExecuteToExecuteWhenFinished()
Verse.LongEventHandler:UpdateCurrentAsynchronousEvent()
Verse.LongEventHandler:LongEventsUpdate(Boolean&)
Verse.Root:DMD<DMD<Update_Patch1>?2077834624::Update_Patch1>(Root)
Verse.Root_Entry:Update()