This is a webiopi question

I want to use webiopi to display multiple buttons on the browser and turn on / off multiple GPIOs for Raspberry Pi, but it doesn't work. Specifically, I would like to turn GPIO12 and 13 on and off with the buttons on the browser, respectively. When I create the program as shown below, the browser displays "This site cannot be accessed". If you delete the 7th line "LIGHT2 = 13", the 14th line "GPIO.setFunction (LIGHT2, GPIO.OUT)" and the last line "GPIO.digitalWrite (LIGHT2, GPIO.LOW)" in script.py, the browser will access it. Yes, only GPIO12 can be operated. How can I make GPIO13 operational as well? Thank you.

`index.html`



<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>WebIOPi | Light Control</title>
    <script type="text/javascript" src="/webiopi.js"></script>
    <script type="text/javascript">
    webiopi().ready(function() {
		var content,button;
        content=$("#content");

        // Create a "Light" labeled button for GPIO 12
        button = webiopi().createGPIOButton(12, "ranp1");
 
        // Append button to HTML element with ID="controls" using jQuery
        $("#controls").append(button);
        button = webiopi().createGPIOButton(13, "Light2");
        $("#controls").append(button);
 
        // Refresh GPIO buttons
        // pass true to refresh repeatedly of false to refresh once
                webiopi().refreshGPIO(true);
    });
 
    </script>
 
<style type="text/css">
        button {
            display: block;
            margin: 5px 5px 5px 5px;
            width: 160px;
            height: 45px;
            font-size: 24pt;
            font-weight: bold;
            color: white;
        }
 
        #gpio12.LOW {
            background-color: Black;
        }
 
        #gpio12.HIGH {
            background-color: Blue;
        }
		
	#gpio13.LOW {
            background-color: Black;
        }
 
        #gpio13.HIGH {
            background-color: Blue;
        }
    </style>
 
</head>
<body>
 
<div id="controls" align="center"></div>
 
</body>
</html>

`script.py`



#! /usr/bin/env /usr/bin/python3
#_*_ cording:utf-8 _*_
import webiopi
import datetime


GPIO = webiopi.GPIO
 
LIGHT = 12 # GPIO pin using BCM numbering
LIGHT2 = 13
HOUR_ON  = 8  # Turn Light ON at 08:00
HOUR_OFF = 18 # Turn Light OFF at 18:00
 
# setup function is automatically called at WebIOPi startup
def setup():
    # set the GPIO used by the light to output
    GPIO.setFunction(LIGHT, GPIO.OUT)
    GPIO.setFunction(LIGHT2, GPIO.OUT)
 
    # retrieve current datetime
    now = datetime.datetime.now()
 
    # test if we are between ON time and tun the light ON
    if ((now.hour >= HOUR_ON) and (now.hour < HOUR_OFF)):
        GPIO.digitalWrite(LIGHT, GPIO.HIGH)
 
# loop function is repeatedly called by WebIOPi 
def loop():
    # retrieve current datetime
    now = datetime.datetime.now()
 
    # toggle light ON all days at the correct time
    if ((now.hour == HOUR_ON) and (now.minute == 0) and (now.second == 0)):
        if (GPIO.digitalRead(LIGHT) == GPIO.LOW):
            GPIO.digitalWrite(LIGHT, GPIO.HIGH)
 
    # toggle light OFF
    if ((now.hour == HOUR_OFF) and (now.minute == 0) and (now.second == 0)):
        if (GPIO.digitalRead(LIGHT) == GPIO.HIGH):
            GPIO.digitalWrite(LIGHT, GPIO.LOW)
 
    # gives CPU some time before looping again
    webiopi.sleep(1)
 
# destroy function is called at WebIOPi shutdown
def destroy():
    GPIO.digitalWrite(LIGHT, GPIO.LOW)
    GPIO.digitalWrite(LIGHT2, GPIO.LOW)