Fatal error: Uncaught Error: Interface "Drupal\Component\Plugin\PluginManagerInterface" not found in /home/fnbrshareacopy/public_html/modules/contrib/webform/src/Plugin/WebformVariantManagerInterface.php:13 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/webform/src/Plugin/WebformVariantManagerInterface.php on line 13