Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/config ^8.0 -> satisfiable by symfony/config[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/config[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/console ^8.0 -> satisfiable by symfony/console[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/console[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/dependency-injection ^8.0 -> satisfiable by symfony/dependency-injection[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/dependency-injection[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 4 - Root composer.json requires symfony/form ^8.0 -> satisfiable by symfony/form[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/form[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 5 - Root composer.json requires symfony/http-foundation ^8.0 -> satisfiable by symfony/http-foundation[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/http-foundation[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 6 - Root composer.json requires symfony/messenger ^8.0 -> satisfiable by symfony/messenger[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/messenger[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 7 - Root composer.json requires symfony/serializer ^8.0 -> satisfiable by symfony/serializer[v8.0.0-BETA1, ..., 8.1.x-dev]. - symfony/serializer[v8.0.0-BETA1, ..., 8.1.x-dev] require php >=8.4 -> your php version (8.1.33) does not satisfy that requirement. Problem 8 - Root composer.json requires phpunit/phpunit ^12.0 -> satisfiable by phpunit/phpunit[12.0.0, ..., 12.5.x-dev]. - phpunit/phpunit[12.0.0, ..., 12.5.x-dev] require php >=8.3 -> your php version (8.1.33) does not satisfy that requirement.