Child process error (exit code 255): PHP Fatal error: Declaration of Knp\Bundle\MenuBundle\DependencyInjection\Configuration::getConfigTreeBuilder() must be compatible with Symfony\Component\Config\Definition\ConfigurationInterface::getConfigTreeBuilder(): Symfony\Component\Config\Definition\Builder\TreeBuilder in /home/runner/work/SonataAdminBundle/SonataAdminBundle/vendor/knplabs/knp-menu-bundle/src/DependencyInjection/Configuration.php on line 20 Fatal error: Declaration of Knp\Bundle\MenuBundle\DependencyInjection\Configuration::getConfigTreeBuilder() must be compatible with Symfony\Component\Config\Definition\ConfigurationInterface::getConfigTreeBuilder(): Symfony\Component\Config\Definition\Builder\TreeBuilder in /home/runner/work/SonataAdminBundle/SonataAdminBundle/vendor/knplabs/knp-menu-bundle/src/DependencyInjection/Configuration.php on line 20