Weird error: AttributeError: 'NoneType' object has no attribute 'find_element' when using seleniumbase CDP mode.

[ZcodeZ777]

I am currently writing a program in Python which uses a Seleniumbase web bot, however, during the running of the program, I am encountering a mysterious error.

Some of the code is as follows:

from seleniumbase import SB

with SB(uc=True, test=True, xvfb=True, incognito=True, agent=<user_agent>, headless=False) as sb:
    url = "https://invideo.io/perf/ga-ai-video-generator-web/?utm_source=google&utm_medium=cpc&utm_campaign=Top16_Search_Brand_Exact_EN&adset_name=InVideo&keyword=invideo&network=g&device=c&utm_term=invideo&utm_content=InVideo&matchtype=e&placement=g&campaign_id=18035330768&adset_id=140632017072&ad_id=616240030555&gad_source=1&gclid=Cj0KCQiAvvO7BhC-ARIsAGFyToWFf0L_8iqkB32qg9prKxVApsklZ8HA69LW2O0Z6XC1nbXXz9sCTTEaAinZEALw_wcB"
    sb.activate_cdp_mode(url)
    sb.sleep(5)
    signup_button = sb.cdp.find_element('//button[@class="iv-inline-block iv-text-body-xl iv-text-black-50 iv-font-semibold iv-cursor-pointer"]')
    signup_button.click()
    temp_driver = sb.get_new_driver(undetectable=True)
    temp_email_gen_url = "https://temp-mail.org/en"
    temp_driver.activate_cdp_mode(temp_email_gen_url)
    temp_email = str(temp_driver.cdp.get_text("//input[@class='emailbox-input opentip']", timeout=300))
    # <FAILS HERE> #

At the part that says FAILS HERE, the following error occurs:

selenium.common.exceptions.SessionNotCreatedException: Message: session not created: cannot connect to chrome at 127.0.0.1:64237 
from chrome not reachable

Does anybody know the reason for this error?

[mdmintz]

You spun up a new driver using sb.get_new_driver(), which changed the default driver, however...
it looks like you didn't activate CDP Mode with the newer driver, so it doesn't have the CDP Mode methods.

Also looks like some import parts are missing (failure was on line 315, but you didn't show that many lines).
A minimal, self-contained code block to reproduce the issue would be more helpful in the future.

[mdmintz]

#3370 (comment)

That usually means Chrome is not in the default location for the OS being used, so you must set it manually with binary_location. Eg: binary_location="/usr/bin/google-chrome". Figure out where Chrome is located, and then set it. Note that on Linux, you'll need to use either google-chrome-stable or google-chrome (but NOT chromium).

Other possible reasons may include port conflicts if multithreading, or missing Linux permissions.

[ZcodeZ777]

I am currently using Windows and I am not multithreading. I have tried setting binary_location but I appear to receive the same error, are there any other common causes for this error?

[mdmintz]

The driver itself wouldn't have activate_cdp_mode(). It would have uc_activate_cdp_mode(). sb has activate_cdp_mode(), so it should be failing earlier than it did. Maybe switch to the BaseCase format and see the example for get_new_driver() - examples/test_multiple_drivers.py, or stick to one driver within your with SB block.

[ZcodeZ777]

OK, I shall have a look at the BaseCase format, will I still be able to use the CDP feature in this format?

[mdmintz]

Yes, you can use UC Mode / CDP Mode with BaseCase formats. Eg. https://github.com/seleniumbase/SeleniumBase/blob/master/examples/verify_undetected.py, but add self.activate_cdp_mode().