# Selenium Undetected Standalone-Chromedriver Selenium Standalone-Chromedriver with Undected-Chromedriver applied ## Bug ```txt Could not start a new session. Response code 500. Message: session not created: probably user data directory is already in use, ``` Go into the `/home/seluser` director in the container and run `rm -rf ~/.config/google-chrome/Singleton*` One-liner : `rm -rf /home/seluser/.config/google-chrome/Singleton* && exit` If it doesn't work, the log can be found in the seluser chrome profile folder in the file `chrome_debug.log` ```txt Could not start a new session. Response code 500. Message: session not created: Chrome instance exited. Examine ChromeDriver verbose log to determine the cause. ``` The log can be found in the seluser chrome profile folder in the file `chrome_debug.log`. If the log file only says that the chrome profile folder seems to be in use by another chrome application, there is probably a problem with a file in the chrome profile folder like a version change. The best thing to do is to delete the folder.