Fatal error: Uncaught Error: Class "WebDriver\Service\CurlService" not found in /home/www/drupal8/test/core/tests/Drupal/FunctionalJavascriptTests/WebDriverCurlService.php:15 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/tests/Drupal/FunctionalJavascriptTests/WebDriverCurlService.php on line 15