Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v6.38.0, ..., v6.43.0] require laravel/framework ^8.83.27 -> found laravel/framework[v8.83.27] but it conflicts with your root composer.json require (10.*). - orchestra/testbench[v7.35.0, ..., v7.41.0] require laravel/framework ^9.52.15 -> found laravel/framework[v9.52.15, v9.52.16] but it conflicts with your root composer.json require (10.*). - orchestra/testbench[v8.15.0, ..., v8.22.0] require phpunit/phpunit ^9.6 || ^10.1 -> found phpunit/phpunit[9.6.0, ..., 9.6.17, 10.1.0, ..., 10.5.13] but it conflicts with your root composer.json require (^11.0). - orchestra/testbench v9.0.0 requires php ^8.2 -> your php version (8.1.27) does not satisfy that requirement. - graham-campbell/testbench v6.1.0 requires orchestra/testbench ^6.38 || ^7.35 || ^8.15 || ^9.0 -> satisfiable by orchestra/testbench[v6.38.0, ..., v6.43.0, v7.35.0, ..., v7.41.0, v8.15.0, ..., v8.22.0, v9.0.0]. - Root composer.json requires graham-campbell/testbench ^6.1 -> satisfiable by graham-campbell/testbench[v6.1.0].