Fatal error: Uncaught Error: Class "Drupal\panels\Form\PanelsBlockConfigureFormBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/panels/src/Form/PanelsAddBlockForm.php:14 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/panels/src/Form/PanelsAddBlockForm.php on line 14