Your requirements could not be resolved to an installable set of packages. Problem 1 - larastan/larastan[v2.7.0, ..., 2.x-dev] require php ^8.0.2 -> your php version (7.3.33) does not satisfy that requirement. - Root composer.json requires larastan/larastan ^2.7.0 -> satisfiable by larastan/larastan[v2.7.0, 2.x-dev].