Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires mgatner/adminlte4 dev-master -> satisfiable by mgatner/adminlte4[dev-master]. - mgatner/adminlte4 dev-master requires almasaeed2010/adminlte dev-v4-dev -> found almasaeed2010/adminlte[dev-dependabot/npm_and_yarn/follow-redirects-1.15.4, ..., dev-github-pages, 1.3.0, 1.3.1, v2.0.0, ..., v2.x-dev, v3.0.0-alpha, ..., v3.x-dev] but it does not match the constraint.