Fatal error: Uncaught Error: Using $this when not in object context in /home/tandomain/projects.codersinsight.co.tz/hrsystem/backend/views/course-category/index.php:12 Stack trace: #0 {main} thrown in /home/tandomain/projects.codersinsight.co.tz/hrsystem/backend/views/course-category/index.php on line 12