Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v9.1.0, ..., 9.x-dev] require orchestra/workbench ^9.1 -> satisfiable by orchestra/workbench[v9.1.0, 9.x-dev]. - orchestra/workbench[v9.1.0, ..., 9.x-dev] require nunomaduro/collision ^8.0 -> found nunomaduro/collision[v8.0.0, ..., v8.x-dev] but it conflicts with your root composer.json require (^7.9). - Root composer.json requires orchestra/testbench ^9.1 -> satisfiable by orchestra/testbench[v9.1.0, v9.1.1, v9.1.2, 9.x-dev].