Fatal error: Uncaught Error: Class 'Drupal\Core\Entity\ContentEntityBase' not found in /var/www/html/tmp/contrib/group/tests/modules/group_test_plugin/src/Entity/EntityTestWithOwner.php:35 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/group/tests/modules/group_test_plugin/src/Entity/EntityTestWithOwner.php on line 35