Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/yaml v6.4.0 requires php >=8.1 -> your php version (7.4.33) does not satisfy that requirement. - symfony/yaml[v7.0.0, ..., v7.0.3] require php >=8.2 -> your php version (7.4.33) does not satisfy that requirement. - Only one of these can be installed: symfony/symfony[v4.4.0, ..., v4.4.51], symfony/yaml[v5.4.0, ..., v5.4.35, v6.4.0, v7.0.0, v7.0.3]. symfony/symfony replaces symfony/yaml and thus cannot coexist with it. - Root composer.json requires symfony/yaml ^5.4 || 6.4 || ^7.0 -> satisfiable by symfony/yaml[v5.4.0, ..., v5.4.35, v6.4.0, v7.0.0, v7.0.3]. - Root composer.json requires symfony/symfony ^4.4 -> satisfiable by symfony/symfony[v4.4.0, ..., v4.4.51].