Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel/framework 12.0 (exact version match: 12.0, 12.0.0 or 12.0.0.0), found laravel/framework[dev-fix-database-cache-driver-write-connection, dev-master, dev-revert-53798-reduce, dev-fixes-54574, dev-issue-54612, dev-volt-page-exception, dev-ascii, dev-11/issue-54401, dev-pipeline-catch, dev-patch-1, v4.0.0-BETA2, ..., 4.2.x-dev, v5.0.0, ..., 5.8.x-dev, v6.0.0, ..., 6.x-dev, v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev, v11.0.0, ..., 11.x-dev, 12.x-dev (alias of dev-master)] but it does not match the constraint. Problem 2 - Root composer.json requires orchestra/testbench 10.* -> satisfiable by orchestra/testbench[10.0.x-dev, 10.x-dev]. - orchestra/testbench[10.0.x-dev, ..., 10.x-dev] require laravel/framework ^12.0 -> found laravel/framework[dev-master, 12.x-dev (alias of dev-master)] but it conflicts with your root composer.json require (12.0).