Fatal error: Uncaught Error: Using $this when not in object context in /home/tandomain/projects.codersinsight.co.tz/hrsystem/vendor/kartik-v/mpdf/includes/upperCase.php:2 Stack trace: #0 {main} thrown in /home/tandomain/projects.codersinsight.co.tz/hrsystem/vendor/kartik-v/mpdf/includes/upperCase.php on line 2