Fatal error: Uncaught Error: Call to undefined method STM_LMS_Assignments::is_draft_assignment() in /web/htdocs5/tempussulihu/home/www/wp-content/plugins/masterstudy-lms-learning-management-system/_core/stm-lms-templates/course-player/navigation.php:25 Stack trace: #0 /web/htdocs5/tempussulihu/home/www/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/templates.php(139): include() #1 /web/htdocs5/tempussulihu/home/www/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/templates.php(147): STM_LMS_Templates::load_lms_template('course-player/n...', Array) #2 /web/htdocs5/tempussulihu/home/www/wp-content/plugins/masterstudy-lms-learning-management-system/_core/stm-lms-templates/course-player.php(206): STM_LMS_Templates::show_lms_template('course-player/n...', Array) #3 /web/htdocs5/tempussulihu/home/www/wp-includes/template-loader.php(106): include('/web/htdocs5/te...') #4 /web/htdocs5/tempussulihu/home/www/wp-blog-header.php(19): require_once('/web/htdocs5/te...') #5 in /web/htdocs5/tempussulihu/home/www/wp-content/plugins/masterstudy-lms-learning-management-system/_core/stm-lms-templates/course-player/navigation.php on line 25