Fatal error: Uncaught Error: Class "Drupal\Core\Render\Element\RenderElementBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/field_group/src/Element/HorizontalTabs.php:17 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/field_group/src/Element/HorizontalTabs.php on line 17