Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires orchestra/testbench ^10.0 -> satisfiable by orchestra/testbench[v10.0.0, 10.x-dev]. - orchestra/testbench[v10.0.0, ..., 10.x-dev] require php ^8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 2 - Root composer.json requires laravel/framework 12.* -> satisfiable by laravel/framework[v12.0.0, v12.0.1, 12.x-dev]. - laravel/framework[v12.0.0, ..., 12.x-dev] require php ^8.2 -> your php version (8.1.31) does not satisfy that requirement.