Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/config ~7.0.0@dev -> satisfiable by symfony/config[v7.0.0-BETA1, ..., 7.0.x-dev]. - symfony/config[v7.0.0-BETA1, ..., 7.0.x-dev] require php >=8.2 -> your php version (8.1.33) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/dependency-injection ~7.0.0@dev -> satisfiable by symfony/dependency-injection[v7.0.0-BETA1, ..., 7.0.x-dev]. - symfony/dependency-injection[v7.0.0-BETA1, ..., 7.0.x-dev] require php >=8.2 -> your php version (8.1.33) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/http-kernel ~7.0.0@dev -> satisfiable by symfony/http-kernel[v7.0.0-BETA1, ..., 7.0.x-dev]. - symfony/http-kernel[v7.0.0-BETA1, ..., 7.0.x-dev] require php >=8.2 -> your php version (8.1.33) does not satisfy that requirement. Problem 4 - Root composer.json requires yoanm/symfony-jsonrpc-http-server-doc ^1.1 -> satisfiable by yoanm/symfony-jsonrpc-http-server-doc[v1.1.0, v1.1.1]. - yoanm/symfony-jsonrpc-http-server-doc[v1.1.0, ..., v1.1.1] require symfony/config ^4.4 || ^5.4 || ^6.0 -> found symfony/config[v4.4.0-BETA1, ..., 4.4.x-dev, v5.4.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev] but it conflicts with your root composer.json require (~7.0.0@dev). Problem 5 - Root composer.json requires dvdoug/behat-code-coverage ^5.0 -> satisfiable by dvdoug/behat-code-coverage[v5.0.0, ..., v5.4.0]. - dvdoug/behat-code-coverage[v5.0.0, ..., v5.0.1] require symfony/config ^3.4||^4.0||^5.0 -> found symfony/config[v3.4.0-BETA1, ..., 3.4.x-dev, v4.0.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but it conflicts with your root composer.json require (~7.0.0@dev). - dvdoug/behat-code-coverage[v5.1.0, ..., v5.2.1] require symfony/config ^4.4||^5.0 -> found symfony/config[v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but it conflicts with your root composer.json require (~7.0.0@dev). - dvdoug/behat-code-coverage[v5.2.2, ..., v5.3.1] require symfony/config ^4.4.30||^5.1.4||^6.0 -> found symfony/config[v4.4.30, ..., 4.4.x-dev, v5.1.4, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev] but it conflicts with your root composer.json require (~7.0.0@dev). - dvdoug/behat-code-coverage[v5.3.2, ..., v5.3.2.1] require symfony/config ^5.1.4||^6.0||^7.0 -> satisfiable by symfony/config[v7.0.0-BETA1, ..., 7.0.x-dev]. - dvdoug/behat-code-coverage[v5.3.3, ..., v5.3.6] require phpunit/php-code-coverage ^10.1||^11.0 -> found phpunit/php-code-coverage[10.1.0, ..., 10.1.x-dev, 11.0.0, ..., 11.0.x-dev] but it conflicts with your root composer.json require (^9.2.4). - dvdoug/behat-code-coverage v5.3.7 requires phpunit/php-code-coverage ^10.1||^11.0||^12.0 -> found phpunit/php-code-coverage[dev-main, 10.1.0, ..., 10.1.x-dev, 11.0.0, ..., 11.0.x-dev, 12.0.0, ..., 12.3.x-dev (alias of dev-main)] but it conflicts with your root composer.json require (^9.2.4). - dvdoug/behat-code-coverage v5.4.0 requires php ^8.3 -> your php version (8.1.33) does not satisfy that requirement. - symfony/config[v7.0.0-BETA1, ..., 7.0.x-dev] require php >=8.2 -> your php version (8.1.33) does not satisfy that requirement.