Fatal error: Uncaught Error: Interface 'Facebook\WebDriver\WebDriver' not found in /home/admin/public_html/moodle/vendor/php-webdriver/webdriver/lib/Support/Events/EventFiringWebDriver.php:17 Stack trace: #0 {main} thrown in /home/admin/public_html/moodle/vendor/php-webdriver/webdriver/lib/Support/Events/EventFiringWebDriver.php on line 17