Fatal error: Uncaught Error: Class "Drupal\Core\Condition\ConditionPluginBase" not found in /home/qcsvlel/www/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php:21 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/system/src/Plugin/Condition/CurrentThemeCondition.php on line 21