Fatal error: Uncaught Error: Class "Drupal\Component\Plugin\Attribute\AttributeBase" not found in /home/qcsvlel/www/core/lib/Drupal/Core/Theme/Icon/Attribute/IconExtractor.php:17 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/lib/Drupal/Core/Theme/Icon/Attribute/IconExtractor.php on line 17