Fatal error: Uncaught Error: Interface "TQB_Export_Step" not found in /home/speciale/public_html/wp-content/plugins/thrive-quiz-builder/includes/admin/classes/export/class-tqb-export-step-abstract.php:7 Stack trace: #0 {main} thrown in /home/speciale/public_html/wp-content/plugins/thrive-quiz-builder/includes/admin/classes/export/class-tqb-export-step-abstract.php on line 7