Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, no array or string given in /data/projects/manual_crawls/preprod/vendor/slim/slim/Slim/App.php:711 Stack trace: #0 /data/projects/manual_crawls/preprod/vendor/slim/slim/Slim/App.php(711): call_user_func_array() #1 /data/projects/manual_crawls/preprod/vendor/slim/slim/Slim/App.php(411): Slim\App->handlePhpError() #2 /data/projects/manual_crawls/preprod/vendor/slim/slim/Slim/App.php(315): Slim\App->process() #3 /data/projects/manual_crawls/preprod/public/index.php(24): Slim\App->run() #4 {main} thrown in /data/projects/manual_crawls/preprod/vendor/slim/slim/Slim/App.php on line 711