Error in the new symfony/config

[iAdil]

Please change it in the Configuration.php file

Pix\SortableBehaviorBundle\DependencyInjection\Configuration

        $treeBuilder = new TreeBuilder('pix_sortable_behavior');
        if (method_exists($treeBuilder, 'getRootNode')) {
            $rootNode = $treeBuilder->getRootNode();
        } else {
            // BC layer for symfony/config 4.1 and older
            $rootNode = $treeBuilder->root('pix_sortable_behavior');
        }

Without we will et an error: Too few arguments to function Symfony\Component\Config\Definition\Builder\TreeBuilder::__construct(), 0 passed in /app/vendor/pixassociates/sortable-behavior-bundle/Pix/SortableBehaviorBundle/DependencyInjection/Configuration.php on line 30 and at least 1 expected

[dmitryuk]

Sonata admin officially migrated to runroom-packages/sortable-behavior-bundle, try it instead. https://symfony.com/bundles/SonataAdminBundle/current/cookbook/recipe_sortable_listing.html