Fatal error: Uncaught Error: Class 'Drupal\Tests\devel\Functional\DevelBrowserTestBase' not found in /var/www/html/tmp/contrib/devel/tests/src/Functional/DevelSwitchUserTest.php:12 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/devel/tests/src/Functional/DevelSwitchUserTest.php on line 12