Your requirements could not be resolved to an installable set of packages. Problem 1 - sylius/sylius[v1.11.15, ..., 1.11.x-dev] require symfony/string ^5.3 -> found symfony/string[v5.3.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires sylius/sylius ~1.11.15 -> satisfiable by sylius/sylius[v1.11.15, 1.11.x-dev].