ESP32 Web Server for PC and Android

I have a Firebeetle ESP32. I found an example of how I can put a web server on it so I can control a LED with my web browser. It works on my PC, but not on my phone. Here is the Arduino code:

/*********
 Rui Santos
 Complete project details at https://randomnerdtutorials.com  
*********/

// Load Wi-Fi library
#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "actual code is different";
const char* password = "actual code is different";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Auxiliar variables to store the current output state
String output26State = "off";
String output27State = "off";
String LEDState = "off";

// Assign output variables to GPIO pins
const int output26 = 26;
const int output27 = 27;

// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0; 
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void setup() {
 Serial.begin(9600);
 // Initialize the output variables as outputs
 pinMode(output26, OUTPUT);
 pinMode(output27, OUTPUT);
 pinMode(LED_BUILTIN, OUTPUT);
 // Set outputs to LOW
 digitalWrite(output26, LOW);
 digitalWrite(output27, LOW);
 digitalWrite(LED_BUILTIN, LOW);

 // Connect to Wi-Fi network with SSID and password
 Serial.print("Connecting to ");
 Serial.println(ssid);
 WiFi.begin(ssid, password);
 while (WiFi.status() != WL_CONNECTED) {
       delay(500);
   Serial.print(".");
 }
 // Print local IP address and start web server
 Serial.println("");
 Serial.println("WiFi connected.");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP());
 server.begin();
}

void loop(){
 WiFiClient client = server.available();   // Listen for incoming clients

 if (client) {                             // If a new client connects,
   currentTime = millis();
   previousTime = currentTime;
   Serial.println("New Client.");          // print a message out in the serial port
   String currentLine = "";                // make a String to hold incoming data from the client
   while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
     currentTime = millis();
     if (client.available()) {             // if there's bytes to read from the client,
       char c = client.read();             // read a byte, then
             Serial.write(c);                    // print it out the serial monitor
       header += c;
       if (c == '\n') {                    // if the byte is a newline character
         // if the current line is blank, you got two newline characters in a row.
         // that's the end of the client HTTP request, so send a response:
         if (currentLine.length() == 0) {
           // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
           // and a content-type so the client knows what's coming, then a blank line:
           client.println("HTTP/1.1 200 OK");
           client.println("Content-type:text/html");
           client.println("Connection: close");
           client.println();
           
           // turns the GPIOs on and off
           if (header.indexOf("GET /26/on") >= 0) {
             Serial.println("GPIO 26 on");
             output26State = "on";
             digitalWrite(output26, HIGH);
           } else if (header.indexOf("GET /26/off") >= 0) {
             Serial.println("GPIO 26 off");
             output26State = "off";
             digitalWrite(output26, LOW);
           } else if (header.indexOf("GET /27/on") >= 0) {
             Serial.println("GPIO 27 on");
                           output27State = "on";
             digitalWrite(output27, HIGH);
           } else if (header.indexOf("GET /27/off") >= 0) {
             Serial.println("GPIO 27 off");
             output27State = "off";
             digitalWrite(output27, LOW);
           } else if (header.indexOf("GET /LED/on") >= 0) {
             Serial.println("LED on");
                           LEDState = "on";
             digitalWrite(LED_BUILTIN, HIGH);
           } else if (header.indexOf("GET /LED/off") >= 0) {
             Serial.println("LED off");
             LEDState = "off";
             digitalWrite(LED_BUILTIN, LOW);
           }

           
           // Display the HTML web page
           client.println("<!DOCTYPE html><html>");
           client.println("<head><meta name=\"ESP32 Interface\">");
           // CSS to style the on/off buttons 
           // Feel free to change the background-color and font-size attributes to fit your preferences
           client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
           client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
           client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
           client.println(".button2 {background-color: #555555;}</style></head>");
           
           // Web Page Heading
           client.println("<body><h1>ESP32 Web Server</h1>");
           
           // Display current state, and ON/OFF buttons for GPIO 26  
                     client.println("<p>GPIO 26 - State " + output26State + "</p>");
           // If the output26State is off, it displays the ON button       
           if (output26State=="off") {
             client.println("<p><a href=\"/26/on\"><button class=\"button\">ON</button></a></p>");
           } else {
             client.println("<p><a href=\"/26/off\"><button class=\"button button2\">OFF</button></a></p>");
           } 
              
           // Display current state, and ON/OFF buttons for GPIO 27  
           client.println("<p>GPIO 27 - State " + output27State + "</p>");
           // If the output27State is off, it displays the ON button       
           if (output27State=="off") {
             client.println("<p><a href=\"/27/on\"><button class=\"button\">ON</button></a></p>");
           } else {
             client.println("<p><a href=\"/27/off\"><button class=\"button button2\">OFF</button></a></p>");
           }
           // Display current state, and ON/OFF buttons for LED  
           client.println("<p>LED - State " + LEDState + "</p>");
           // If the LEDState is off, it displays the ON button       
           if (LEDState=="off") {
             client.println("<p><a href=\"/LED/on\"><button class=\"button\">ON</button></a></p>");
           } else {
             client.println("<p><a href=\"/LED/off\"><button class=\"button button2\">OFF</button></a></p>");
           }
           client.println("</body></html>");
           
           // The HTTP response ends with another blank line
           client.println();
           // Break out of the while loop
           break;
         } else { // if you got a newline, then clear currentLine
           currentLine = "";
                     }
       } else if (c != '\r') {  // if you got anything else but a carriage return character,
         currentLine += c;      // add it to the end of the currentLine
       }
     }
   }
   // Clear the header variable
   header = "";
   // Close the connection
   client.stop();
   Serial.println("Client disconnected.");
   Serial.println("");
 }
}

From my Windows laptop I open Chrome and enter 10.0.0.118. I get the web page and I can click on buttons to toggle ESP32 outputs. But when I enter the same address in Chrome on my Android phone, it waits a long time and says the site can't be reached. Both are connected to my wifi. I also tried closing the PC web page before trying to open it on the phone.

Has anyone else gotten this to work on a cell phone? Does anyone know what I'm doing wrong?