Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/tholic/training.stjohnkenya.org/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/courses.php:7 Stack trace: #0 /home/tholic/training.stjohnkenya.org/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/courses.php(2): STM_LMS_Courses->__construct() #1 {main} thrown in /home/tholic/training.stjohnkenya.org/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/courses.php on line 7