Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - symfony/process is locked to version v7.2.0 and an update of this package was not requested. - symfony/process v7.2.0 requires php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 2 - infection/infection is locked to version 0.27.8 and an update of this package was not requested. - infection/infection 0.27.8 requires symfony/process ^5.4 || ^6.0 || ^7.0 -> satisfiable by symfony/process[v7.2.0]. - symfony/process v7.2.0 requires php >=8.2 -> your php version (8.1.31) does not satisfy that requirement.