Fatal error: Uncaught Error: Class 'Drupal\FunctionalJavascriptTests\WebDriverTestBase' not found in /var/www/html/tmp/contrib/field_group/tests/src/FunctionalJavascript/HorizontalTabsLabelsTest.php:17 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/field_group/tests/src/FunctionalJavascript/HorizontalTabsLabelsTest.php on line 17