Fatal error: Uncaught Error: Call to a member function get_results() on null in /home3/mercatri/public_html/wp-content/plugins/tutor-pro/addons/tutor-report/views/pages/courses/graph/last_week.php:32 Stack trace: #0 {main} thrown in /home3/mercatri/public_html/wp-content/plugins/tutor-pro/addons/tutor-report/views/pages/courses/graph/last_week.php on line 32