Fatal error: Uncaught Error: Call to undefined function app() in C:\xampp\htdocs\erp\storage\framework\views\733636ad1373777eb67024019cf74f44.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\erp\storage\framework\views\733636ad1373777eb67024019cf74f44.php on line 4