Fatal error: Uncaught Error: Call to undefined function app() in C:\laragon\www\bookstack\storage\framework\views\f06c917ae2957895d64c54355eeea039.php:2 Stack trace: #0 {main} thrown in C:\laragon\www\bookstack\storage\framework\views\f06c917ae2957895d64c54355eeea039.php on line 2