Fatal error: Uncaught Error: Class "Drupal\Tests\BrowserTestBase" not found in /home/quitpathshareaco/public_html/New/vendor/drupal/core/modules/comment/tests/src/Functional/CommentTestBase.php:21 Stack trace: #0 {main} thrown in /home/quitpathshareaco/public_html/New/vendor/drupal/core/modules/comment/tests/src/Functional/CommentTestBase.php on line 21