Fatal error: Uncaught Error: Interface "Maatwebsite\Sidebar\Item" not found in /home/bookshelter/public_html/vendor/maatwebsite/laravel-sidebar/src/Domain/DefaultItem.php:18 Stack trace: #0 {main} thrown in /home/bookshelter/public_html/vendor/maatwebsite/laravel-sidebar/src/Domain/DefaultItem.php on line 18