Fatal error: Uncaught Error: Class 'Drupal\FunctionalJavascriptTests\WebDriverTestBase' not found in /var/www/html/tmp/contrib/flag/modules/flag_bookmark/tests/src/FunctionalJavascript/FlagBookmarkUITest.php:12 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/flag/modules/flag_bookmark/tests/src/FunctionalJavascript/FlagBookmarkUITest.php on line 12