Fatal error: Uncaught Facebook\WebDriver\Exception\UnknownErrorException: unknown error: Failed to create Chrome process. in /var/www/hubnet/cronjobs/selenium/vendor/php-webdriver/webdriver/lib/Exception/WebDriverException.php:143 Stack trace: #0 /var/www/hubnet/cronjobs/selenium/vendor/php-webdriver/webdriver/lib/Remote/HttpCommandExecutor.php(385): Facebook\WebDriver\Exception\WebDriverException::throwException('unknown error', 'unknown error: ...', Array) #1 /var/www/hubnet/cronjobs/selenium/vendor/php-webdriver/webdriver/lib/Remote/RemoteWebDriver.php(134): Facebook\WebDriver\Remote\HttpCommandExecutor->execute(Object(Facebook\WebDriver\Remote\WebDriverCommand)) #2 /var/www/hubnet/cronjobs/selenium/selenium_test.php(26): Facebook\WebDriver\Remote\RemoteWebDriver::create('http://localhos...', Object(Facebook\WebDriver\Remote\DesiredCapabilities)) #3 {main} thrown in /var/www/hubnet/cronjobs/selenium/vendor/php-webdriver/webdriver/lib/Exception/WebDriverException.php on line 143