Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires bermudaphp/psr15factory ^3.0 -> satisfiable by bermudaphp/psr15factory[v3.0.0]. - bermudaphp/psr15factory v3.0.0 requires bermudaphp/config ^1.4 -> found bermudaphp/config[v1.4] but it conflicts with your root composer.json require (^2.0).