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When I use both arguments --headless and user-data-dir. Selenium raise selenium.common.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn't exist exception. If only 1 of them is used, then everything works as needs.

I tried to swap arguments and remove some of them. Specified the full path to chromedriver.exe. None of this helped.

chromeOptions.add_argument("--disable-dev-shm-using") DIDN'T HELP ME.

login = "test"
chromeOptions = webdriver.ChromeOptions() 
chromeOptions.add_experimental_option("prefs", {"profile.managed_default_content_settings.images": 2}) 
chromeOptions.add_argument("--no-sandbox") 
chromeOptions.add_argument("--disable-setuid-sandbox") 
chromeOptions.add_argument("--disable-dev-shm-using") 
chromeOptions.add_argument("--disable-extensions") 
chromeOptions.add_argument("--disable-gpu") 
chromeOptions.add_argument("start-maximized") 
chromeOptions.add_argument("disable-infobars") 
chromeOptions.add_argument("--headless") 
chromeOptions.add_argument(r"user-data-dir=.\cookies\\" + login) 
b = webdriver.Chrome(chrome_options=chromeOptions) 
b.get("https://google.com/") 
b.quit()
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1 Answer 1

Reset to default
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I solve it by adding an argument --remote-debugging-port=<port>

chromeOptions = webdriver.ChromeOptions() 
chromeOptions.add_experimental_option("prefs", {"profile.managed_default_content_settings.images": 2}) 
chromeOptions.add_argument("--no-sandbox") 
chromeOptions.add_argument("--disable-setuid-sandbox") 

chromeOptions.add_argument("--remote-debugging-port=9222")  # this

chromeOptions.add_argument("--disable-dev-shm-using") 
chromeOptions.add_argument("--disable-extensions") 
chromeOptions.add_argument("--disable-gpu") 
chromeOptions.add_argument("start-maximized") 
chromeOptions.add_argument("disable-infobars")
chromeOptions.add_argument(r"user-data-dir=.\cookies\\test") 

b = webdriver.Chrome(chrome_options=chromeOptions) 
b.get("https://google.com/") 
b.quit()
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8 Comments

Could you explain why this fixes it ?
@mosaad so, I have forgotten everything, but I think this fixes it because chrome can't connect to debug and you need to make it manual.
Could you please say where this code has been added? What is the name of the file?
maybe port was taken
If nothing works, try to restart your PC. Worked for me.
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