Your requirements could not be resolved to an installable set of packages. Problem 1 - friendsofsymfony/http-cache[2.15.0, ..., 2.x-dev] require symfony/event-dispatcher ^4.3 || ^5.0 || ^6.0 -> found symfony/event-dispatcher[v4.3.0, ..., v4.4.44, v5.0.0, ..., v5.4.35, v6.0.0, ..., v6.4.3] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires phpunit/phpunit ^9.6.15 -> satisfiable by phpunit/phpunit[9.6.15, 9.6.16, 9.6.17, 9.6.18]. - friendsofsymfony/http-cache 3.x-dev conflicts with phpunit/phpunit <10. - Root composer.json requires friendsofsymfony/http-cache ^2.15 || 3.x-dev -> satisfiable by friendsofsymfony/http-cache[2.15.0, ..., 2.x-dev, 3.x-dev].