System.Reflection.TargetException: Object does not match target type

I have two dlls right next to each other in a directory. When I load an assembly invoke a method from DLL A onto DLL B then invoke a method from DLL B back onto DLL A, but it fails at the last step and throws the following error

                             System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetException: Object does not match target type.
                                at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)
                                at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
                                at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
                                at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
                                at ServerSDK.BootStrapper.GetPlayerSteamID(UInt16 playerid)

And here is the code.

public void Init() {

        string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
        string file = Path.Combine(assemblyFolder, "NetworkSystem.dll");
        Assembly assembly = Assembly.LoadFile(file);
        type = assembly.GetType("ScriptingAPI.ScriptEngine");

        getSteamMethod = type.GetMethod("GetSteamID", new Type[] { typeof(ushort) });
        Console.WriteLine("bootstrap module executed");       



    }

    public static string GetPlayerSteamID(ushort playerid)
    {
        var steamid = getSteamMethod.Invoke((object)type, new object[1] { playerid });
        return steamid.ToString();
    }

and here is the method that from DLL A I am attempting to invoke

    public string GetSteamID(ushort playerID)
    {
        Console.WriteLine(playerID.GetType().Name);
        return connectedPlayers[playerID].steamID;
    }

Also I feel like I need something like Activator.GetInstance instead of CreateInstance as the DLL is already running and if i was to use CreateInstance it would in turn throw null reference exceptions.