Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires inertiajs/inertia-laravel ^0.6 -> satisfiable by inertiajs/inertia-laravel[v0.6.0, ..., v0.6.11]. - illuminate/contracts 11.x-dev is an alias of illuminate/contracts dev-master and thus requires it to be installed too. - Conclusion: don't install illuminate/contracts dev-master (conflict analysis result) - laravel/framework 11.x-dev conflicts with doctrine/dbal <4.0.0|>=5.0. - Root composer.json requires illuminate/contracts ^11 -> satisfiable by illuminate/contracts[11.x-dev (alias of dev-master)], laravel/framework[11.x-dev (alias of dev-master)]. - Root composer.json requires doctrine/dbal ^3.6 -> satisfiable by doctrine/dbal[3.6.0, ..., 3.8.x-dev].