Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires jane-php/json-schema ^7.4 -> satisfiable by jane-php/json-schema[v7.4.0, ..., v7.5.5]. - jane-php/json-schema[v7.4.0, ..., v7.5.5] require symfony/console ^4.4 || ^5.0 || ^6.0 -> found symfony/console[v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.32, v6.0.0, ..., v6.4.1] but these were not loaded, likely because it conflicts with another require. Problem 2 - jane-php/json-schema-runtime[v7.4.0, ..., v7.5.5] require symfony/serializer ^4.4 || ^5.0 || ^6.0 -> found symfony/serializer[v4.4.0, ..., v4.4.47, v5.0.0, ..., v5.4.33, v6.0.0, ..., v6.4.1] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires jane-php/json-schema-runtime ^7.4 -> satisfiable by jane-php/json-schema-runtime[v7.4.0, ..., v7.5.5].