Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/dependency-injection ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/dependency-injection[v6.1.0-BETA1, ..., 6.1.x-dev]. - symfony/dependency-injection[v6.1.0-BETA1, ..., 6.1.x-dev] require php >=8.1 -> your php version (7.3.33) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/filesystem ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/filesystem[v6.1.0-BETA1, ..., 6.1.x-dev]. - symfony/filesystem[v6.1.0-BETA1, ..., 6.1.x-dev] require php >=8.1 -> your php version (7.3.33) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/http-kernel ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/http-kernel[v6.1.0-BETA1, ..., 6.1.x-dev]. - symfony/http-kernel[v6.1.0-BETA1, ..., 6.1.x-dev] require php >=8.1 -> your php version (7.3.33) does not satisfy that requirement. Problem 4 - Root composer.json requires symfony/yaml ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/yaml[v6.1.0-BETA1, ..., 6.1.x-dev]. - symfony/yaml[v6.1.0-BETA1, ..., 6.1.x-dev] require php >=8.1 -> your php version (7.3.33) does not satisfy that requirement. Problem 5 - symfony/framework-bundle[v6.1.0-BETA1, ..., 6.1.x-dev] require php >=8.1 -> your php version (7.3.33) does not satisfy that requirement. - Root composer.json requires symfony/framework-bundle ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/framework-bundle[v6.1.0-BETA1, ..., 6.1.x-dev].