Fatal error: Uncaught Error: Call to undefined function app() in C:\xampp\htdocs\erp\storage\framework\views\9bd17ce377edce8ad2fbfc93b338aee3.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\erp\storage\framework\views\9bd17ce377edce8ad2fbfc93b338aee3.php on line 4