collection-crud/config/packages/routing.php

<?php declare(strict_types=1);

use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->extension('framework', [
		'router' => [
			'strict_requirements' => null,
			'utf8' => true
		]
	]);
};