Fatal error: Uncaught Error: Call to undefined function app() in C:\xampp\htdocs\erp\storage\framework\views\ce67b6990f81693155e39b796f528566.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\erp\storage\framework\views\ce67b6990f81693155e39b796f528566.php on line 4