Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires maglnet/composer-require-checker 2.0 -> satisfiable by maglnet/composer-require-checker[2.0.0]. - Root composer.json requires symfony/yaml ^4.4|^5.0 -> satisfiable by symfony/yaml[v5.4.0, ..., v5.4.45]. - maglnet/composer-require-checker 2.0.0 requires symfony/console ^3.4.17 | ^4.1.6 -> satisfiable by symfony/console[v4.4.0, ..., v4.4.49]. - symfony/yaml[v5.4.0, ..., v5.4.45] conflict with symfony/console <5.3. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.