Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires rector/rector ^2.0 -> satisfiable by rector/rector[2.0.0]. - rector/rector 2.0.0 requires phpstan/phpstan ^2.0.1 -> found phpstan/phpstan[2.0.1, 2.0.2, 2.0.3] but it conflicts with your root composer.json require (1.12.12).