Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires gally/gally-sample-data dev-main -> satisfiable by gally/gally-sample-data[dev-main]. - gally/gally-sample-data dev-main requires hautelook/alice-bundle 2.16.0 -> found hautelook/alice-bundle[2.16.0] but it conflicts with your root composer.json require (2.11.0). Problem 2 - Root composer.json requires gally/gally-standard dev-main as 2.2.1 -> satisfiable by gally/gally-standard[dev-main]. - gally/gally-standard dev-main requires api-platform/doctrine-orm ^4.1.0 -> found api-platform/doctrine-orm[v4.1.0, ..., v4.2.16] but these were not loaded, likely because it conflicts with another require. Problem 3 - Root composer.json requires gally/gally-premium dev-main as 2.2.1 -> satisfiable by gally/gally-premium[dev-main]. - gally/gally-premium dev-main requires gally/gally-standard dev-main -> satisfiable by gally/gally-standard[dev-main]. - gally/gally-standard dev-main requires api-platform/doctrine-orm ^4.1.0 -> found api-platform/doctrine-orm[v4.1.0, ..., v4.2.16] but these were not loaded, likely because it conflicts with another require. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.