Your requirements could not be resolved to an installable set of packages. Problem 1 - Conclusion: don't install laravel/framework v11.0.1 (conflict analysis result) - Conclusion: don't install laravel/framework v11.0.2 (conflict analysis result) - Conclusion: don't install laravel/framework v11.0.3 (conflict analysis result) - kreait/laravel-firebase 5.0.0 requires illuminate/support ^9.0 -> found illuminate/support[v9.0.0, ..., v9.52.16] but it conflicts with your root composer.json require (^10.0|^11.0). - kreait/laravel-firebase[5.1.0, ..., 5.7.0] require illuminate/support ^9.0 || ^10.0 -> satisfiable by illuminate/support[v10.0.0, ..., v10.48.2]. - Only one of these can be installed: laravel/framework[v11.0.0, v11.0.1, v11.0.2, v11.0.3], illuminate/support[v10.0.0, ..., v10.48.2, v11.0.0, v11.0.1, v11.0.2, v11.0.3]. laravel/framework replaces illuminate/support and thus cannot coexist with it. - Root composer.json requires laravel/framework 11.* -> satisfiable by laravel/framework[v11.0.0, v11.0.1, v11.0.2, v11.0.3]. - Root composer.json requires kreait/laravel-firebase ^5.0 -> satisfiable by kreait/laravel-firebase[5.0.0, ..., 5.7.0].