Fatal error: Uncaught Error: Class "Drupal\Core\Form\FormBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/panels/panels_ipe/src/Form/PanelsIPEBlockPluginForm.php:31 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/panels/panels_ipe/src/Form/PanelsIPEBlockPluginForm.php on line 31