Fatal error: Uncaught Error: Call to undefined function app() in C:\xampp\htdocs\erp\storage\framework\views\21880234d19dfa874aa7cbab31c8c2d0.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\erp\storage\framework\views\21880234d19dfa874aa7cbab31c8c2d0.php on line 4