Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires simplesamlphp/xml-common dev-feature/dom-migration-php84, found simplesamlphp/xml-common[dev-master, dev-release-1.x, dev-release-2.7, dev-release-3.x, v0.1.0, ..., v0.12.4, v1.0.0, ..., v1.27.0, v2.0.0, ..., v2.8.1, v3.0.0, 3.0.x-dev (alias of dev-master)] but it does not match the constraint. Problem 2 - Root composer.json requires simplesamlphp/xml-security dev-feature/dom-migration-php84, found simplesamlphp/xml-security[dev-master, dev-release-0.6, dev-release-1.x, dev-release-2.x, dev-release-3.x, dev-revert-87-dependabot/github_actions/all-actions-484570b1b1, v0.0.1, ..., v0.6.6, v1.0.0, ..., v1.13.9, v2.0.0, ..., 2.4.x-dev (alias of dev-master), v3.0.0] but it does not match the constraint. Problem 3 - Root composer.json requires simplesamlphp/xml-soap dev-feature/dom-migration-php84 -> satisfiable by simplesamlphp/xml-soap[dev-feature/dom-migration-php84]. - simplesamlphp/xml-soap dev-feature/dom-migration-php84 requires simplesamlphp/xml-common dev-feature/dom-migration-php84 -> found simplesamlphp/xml-common[dev-master, dev-release-1.x, dev-release-2.7, dev-release-3.x, v0.1.0, ..., v0.12.4, v1.0.0, ..., v1.27.0, v2.0.0, ..., v2.8.1, v3.0.0, 3.0.x-dev (alias of dev-master)] but it does not match the constraint. Problem 4 - Root composer.json requires simplesamlphp/simplesamlphp ^2.5 -> satisfiable by simplesamlphp/simplesamlphp[v2.5.2]. - simplesamlphp/simplesamlphp v2.5.2 requires simplesamlphp/saml2 ~6.1 -> satisfiable by simplesamlphp/saml2[dev-master, v6.1.0, ..., v6.2.3] from composer repo (https://repo.packagist.org) but simplesamlphp/saml2 dev-release-7.x is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.