Wemos erro

Hi
I have tried to make this code work but it cannot load the html file, index.h in my web browser.
When my wemos is connected to my routher and when I enter IP address nothing happens. ??

* circuits4you.com
 */
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
 
#include "index.h" //Our HTML webpage contents
 
//SSID and Password of your WiFi router
const char* ssid = "lillenet 2.4 GHz";
const char* password = "";
 
ESP8266WebServer server(80); //Server on port 80
 
//===============================================================
// This routine is executed when you open its IP in browser
//===============================================================
void handleRoot() {
 String s = MAIN_page; //Read HTML contents
 server.send(200, "text/html", s); //Send web page
}
//==============================================================
//                  SETUP
//==============================================================
void setup(void){
  Serial.begin(9600);
  
  WiFi.begin(ssid, password);     //Connect to your WiFi router
  Serial.println("");
 
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
 
  //If connection successful show IP address in serial monitor
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());  //IP address assigned to your ESP
 
  server.on("/", handleRoot);      //Which routine to handle at root location
 
  server.begin();                  //Start server
  Serial.println("HTTP server started");
}
//==============================================================
//                     LOOP
//==============================================================
void loop(void){
  server.handleClient();          //Handle client requests
}

HTML code

const char MAIN_page[] PROGMEM = R"=====(
<HTML>
    <HEAD>
            <TITLE>My first web page</TITLE>
    </HEAD>
<BODY>
    <CENTER>
            <B>Hello World.... </B>
    </CENTER>
</BODY>
</HTML>
)=====";