Fatal error: Uncaught Error: Interface 'Symfony\Component\String\Slugger\SluggerInterface' not found in D:\xampp7\htdocs\www\nbkm\show_ir\vendor\symfony\string\Slugger\AsciiSlugger.php:21 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_ir\vendor\symfony\string\Slugger\AsciiSlugger.php on line 21