A Mod caused an error [System.Exception]

Details:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> HarmonyLib.HarmonyException: Patching exception in method null ---> System.ArgumentException: Undefined target method for patch method static System.Collections.Generic.IEnumerable`1<HarmonyLib.CodeInstruction> EightyOne2.Patches.DistrictManagerPatches::GetPark2Transpiler(System.Collections.Generic.IEnumerable`1<HarmonyLib.CodeInstruction> instructions, System.Reflection.MethodBase original)
at HarmonyLib.PatchClassProcessor.PatchWithAttributes (System.Reflection.MethodBase