Fatal error: Uncaught Error: Call to undefined function app() in C:\WebServer\htdocs\bookshelf\storage\framework\views\736a4aaa235de3af9ba2a31bdb330d6b.php:1 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\storage\framework\views\736a4aaa235de3af9ba2a31bdb330d6b.php on line 1