Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ~8.3.0 || ~8.4.0 || ~8.5.0 but your php version (8.1.34) does not satisfy that requirement. Problem 2 - Root composer.json requires phpunit/phpunit ^12.5.23 -> satisfiable by phpunit/phpunit[12.5.23]. - phpunit/phpunit 12.5.23 requires php >=8.3 -> your php version (8.1.34) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/var-dumper ^7.4.8 || ^v8.0.8 -> satisfiable by symfony/var-dumper[v7.4.8, v8.0.8]. - symfony/var-dumper v7.4.8 requires php >=8.2 -> your php version (8.1.34) does not satisfy that requirement. - symfony/var-dumper v8.0.8 requires php >=8.4 -> your php version (8.1.34) does not satisfy that requirement.