Fatal error: Uncaught Error: Class 'Drupal\Tests\flag\FunctionalJavascript\FlagJsTestBase' not found in /var/www/html/tmp/contrib/flag/tests/src/FunctionalJavascript/LinkTypeConfirmFormTest.php:10 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/flag/tests/src/FunctionalJavascript/LinkTypeConfirmFormTest.php on line 10