Fatal error: Uncaught Error: Class 'Drupal\Core\Plugin\PluginBase' not found in /var/www/html/tmp/contrib/devel/devel_generate/src/DevelGenerateBase.php:16 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/devel/devel_generate/src/DevelGenerateBase.php on line 16