Fatal error: Uncaught Error: Class 'Drupal\Component\Plugin\Derivative\DeriverBase' not found in /var/www/html/tmp/contrib/devel/tests/modules/devel_entity_test/src/Plugin/Derivative/DevelEntityTestLocalTasks.php:10 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/devel/tests/modules/devel_entity_test/src/Plugin/Derivative/DevelEntityTestLocalTasks.php on line 10