i am trying to do a submit by using selenium but am unable to find the inputbox

this is my code

def check_water_bill(account_number):
    driver = webdriver.Chrome(options=options)  # Initialize the WebDriver
    base_url = "https://waterauthority.com.fj/en/mybill//"
    url = base_url
    driver.get(url)  # URL
    wait = WebDriverWait(driver, 30)

    try:
        # Wait until the popup container is present
        popup_container = wait.until(EC.presence_of_element_located( (By.XPATH, "//div[@class='popup-container']")))
       
        popup_html = popup_container.get_attribute('innerHTML')
        print(popup_html)
        # Find and interact with the account number input field
        account_number_input = wait.until(EC.visibility_of_element_located((By.XPATH, "//input[@name='account_number']")))

        if account_number_input.is_displayed():
                    print("Yes")
        else:
            print("No")


    except Exception as e:
        print(f"Error: {e}")
    
    finally:
        driver.quit()  # Always quit the WebDriver session at the end

my output so far is this:

       <div id="water-bill-popup">
            <span class="close-popup" id="close-popup">X</span> <!-- Close icon -->

            <!-- Display the form at the top -->
            <form id="water-bill-form" method="post">
                <h3 class="form-heading">CHECK MY BILL</h3>
                <label for="account_number">Account Number:</label>
                <input type="text" name="account_number" id="account_number" required="">
                <input class="submit center-button" type="submit" value="Check Water Bill">
            </form>

                    </div>

Error: Message:

None

i dont get it if am able to find the popup container, why can i not find the input button

can i get some assistance please.

i tried locating by id and class but still had no luck