Fatal error: Uncaught Error: Call to undefined function TUTOR() in /home/risei/public_html/wp-content/plugins/tutor-pro/templates/email/to_instructor_course_completed.php:17 Stack trace: #0 {main} thrown in /home/risei/public_html/wp-content/plugins/tutor-pro/templates/email/to_instructor_course_completed.php on line 17