Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires doctrine/doctrine-bundle ^1.7.2 || <2.7.1 -> satisfiable by doctrine/doctrine-bundle[v1.0.0, ..., 1.12.13, 2.0.0, ..., 2.7.0]. - Root composer.json requires symfony/mailer ^5.1 || ^6.0 || ^7.0 -> satisfiable by symfony/mailer[v6.4.0]. - symfony/doctrine-bridge v6.4.0 conflicts with doctrine/orm <2.15. - Conclusion: install symfony/doctrine-bridge v6.4.0 (conflict analysis result) - Root composer.json requires doctrine/orm ^2.6.3 -> satisfiable by doctrine/orm[v2.6.3, ..., 2.17.2]. - Conclusion: don't install symfony/doctrine-bridge[v6.4.0] | install one of doctrine/orm[2.8.5, ..., 2.13.5] (conflict analysis result)