Your requirements could not be resolved to an installable set of packages. Problem 1 - doctrine/instantiator 2.0.0 requires php ^8.1 -> your php version (7.4.33) does not satisfy that requirement. - yoast/phpunit-polyfills 1.1.2 requires phpunit/phpunit ^4.8.36 || ^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0 -> satisfiable by phpunit/phpunit[9.6.21]. - phpunit/phpunit 9.6.21 requires doctrine/instantiator ^1.5.0 || ^2 -> satisfiable by doctrine/instantiator[2.0.0]. - yoast/phpunit-polyfills is locked to version 1.1.2 and an update of this package was not requested.