Fatal error: Uncaught Error: Class "Drupal\Core\Action\ActionBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/email_registration/src/Plugin/Action/UpdateUsernameAction.php:18 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/email_registration/src/Plugin/Action/UpdateUsernameAction.php on line 18