Fatal error: Uncaught Error: Class "Drupal\migrate\ProcessPluginBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/email_registration/src/Plugin/migrate/process/EmailRegistrationUserName.php:42 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/email_registration/src/Plugin/migrate/process/EmailRegistrationUserName.php on line 42