Fatal error: Uncaught Error: Call to undefined function app() in /home/bimmertest/BookStack/storage/framework/views/5d00a0ae1a16c242d9b8bc0ab168ad2a5a37fbea.php:1 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/storage/framework/views/5d00a0ae1a16c242d9b8bc0ab168ad2a5a37fbea.php on line 1