Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires fisharebest/webtrees ~2.2.0 || dev-main -> satisfiable by fisharebest/webtrees[dev-main]. - ezyang/htmlpurifier v4.17.0 requires php ~5.6.0 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. - fisharebest/webtrees dev-main requires ezyang/htmlpurifier 4.17.0 -> satisfiable by ezyang/htmlpurifier[v4.17.0].