Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires roots/wordpress 6.3.5 -> satisfiable by roots/wordpress[6.3.5]. - roots/wordpress 6.3.5 requires roots/wordpress-core-installer ^1.0.0 -> found roots/wordpress-core-installer[1.0.0, 1.1.0, 1.100.0] but the package is fixed to 2.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.