Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/adaptyo3/public_html/wp-content/plugins/formidable-registration/models/FrmRegLoginWidget.php:6 Stack trace: #0 {main} thrown in /home/adaptyo3/public_html/wp-content/plugins/formidable-registration/models/FrmRegLoginWidget.php on line 6