Fatal error: Uncaught Error: Class 'kartik\sidenav\SideNav' not found in /home/wittyly/public_html/staging/hr-witty/vendor/kartik-v/yii2-widgets/src/SideNav.php:39 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/hr-witty/vendor/kartik-v/yii2-widgets/src/SideNav.php on line 39