Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires larastan/larastan ^3.0 -> satisfiable by larastan/larastan[v3.0.0, ..., 3.x-dev]. - Root composer.json requires orchestra/testbench ^10.0|^11.0 -> satisfiable by orchestra/testbench[10.0.x-dev, 10.x-dev]. - larastan/larastan[v3.0.0, ..., 3.x-dev] require illuminate/support ^11.15.0 -> satisfiable by illuminate/support[v11.15.0, ..., 11.x-dev]. - Conclusion: don't install illuminate/support v11.33.2 (conflict analysis result) - Conclusion: don't install illuminate/support v11.41.0 (conflict analysis result) - Conclusion: don't install illuminate/support v11.43.0 (conflict analysis result)