Fatal error: Uncaught Error: Call to undefined function app() in C:\xampp\htdocs\erp\storage\framework\views\31f58ad2d506706e0791f658b04671a6.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\erp\storage\framework\views\31f58ad2d506706e0791f658b04671a6.php on line 4