Fatal error: Uncaught Error: Class 'Facebook\WebDriver\Exception\UnknownErrorException' not found in C:\xampp\htdocs\finance-ll\vendor\php-webdriver\webdriver\lib\Exception\UnknownServerException.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\finance-ll\vendor\php-webdriver\webdriver\lib\Exception\UnknownServerException.php on line 8