How to find the the CloudFlare human verification element using Selenium - selenium-webdriver

Question

The browser is FireFox and the language is Python.I am unable to complete the CloudFlare human verification.
In this website(https://chat.openai.com/chat), I'm unable to find the "mark" element by this code:
verify=WebDriverWait(driver, 10,0.1).until(EC.presence_of_element_located((By.CLASS_NAME, 'mark')))
HTML:
Error Message:
Traceback (most recent call last):
File ,
verify=WebDriverWait(driver, 10,0.1).until(EC.presence_of_element_located((By.CLASS_NAME, 'mark')))
File "...Python310\lib\site-packages\selenium\webdriver\support\wait.py", line 90, in until
raise TimeoutException(message, screen, stacktrace)
selenium.common.exceptions.TimeoutException: Message:
Stacktrace:
RemoteError#chrome://remote/content/shared/RemoteError.jsm:12:1
WebDriverError#chrome://remote/content/shared/webdriver/Errors.jsm:192:5
NoSuchElementError#chrome://remote/content/shared/webdriver/Errors.jsm:404:5
element.find/</<#chrome://remote/content/marionette/element.js:291:16
Why and how to fix it.

Answer 1

The element <span class="mark>...</mark> have a visible text in it. So to identify the element instead of presence_of_element_located() you need to induce WebDriverWait for the visibility_of_element_located() and you can use either of the following locator strategies:
Using CSS_SELECTOR:
element = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.CSS_SELECTOR, "label.ctp-checkbox-label span.mark")))
Using XPATH:
element = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, "//label[#class='ctp-checkbox-label']//span[#class='mark']")))
Note : You have to add the following imports :
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC