Fatal error: Uncaught Error: Class "Drupal\Core\Display\VariantBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/page_manager/src/Plugin/DisplayVariant/LayoutBuilderDisplayVariant.php:21 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/page_manager/src/Plugin/DisplayVariant/LayoutBuilderDisplayVariant.php on line 21