visual studio with c# SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:8080 error

Question

I am getting this issue: No connection could be made because the target machine actively refused it 127.0.0.1:8080.I use Sikuli4net library but scrn.click dont use metod

namespace deneme;
using System;
using Sikuli4Net.sikuli_REST;
using Sikuli4Net.sikuli_UTIL;
public partial class Form1 : Form
{    
   public Form1()
   {
       InitializeComponent();
   }    
   private void Form1_Load(object sender, EventArgs e)
   {
   }
   private void button1_Click(object sender, EventArgs e)
   {
       APILauncher launcher = new APILauncher();
       launcher.Start();
       Pattern pattern1 = new Pattern(@"C: \Users\Ramesh\Desktop\Images\Dc.png");
       Screen scrn = new Screen();
       scrn.Click(pattern1);
   }
}

While doing so I get this error:

enter image description here