Fatal error: Uncaught Error: Class 'SureCart\Models\Model' not found in /home/sifracom/public_html/wp-content/plugins/surecart/app/src/Models/Referral.php:13 Stack trace: #0 {main} thrown in /home/sifracom/public_html/wp-content/plugins/surecart/app/src/Models/Referral.php on line 13