Fatal error: Uncaught Error: Interface "Silex\ServiceProviderInterface" not found in /home/trpdev/public_html/vendor/cocur/slugify/src/Bridge/Silex/SlugifyServiceProvider.php:28 Stack trace: #0 {main} thrown in /home/trpdev/public_html/vendor/cocur/slugify/src/Bridge/Silex/SlugifyServiceProvider.php on line 28