Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires infection/infection ^0.26.6 -> satisfiable by infection/infection[0.26.6, ..., 0.26.21]. - infection/infection[0.26.6, ..., 0.26.11] require symfony/console ^3.4.29 || ^4.1.19 || ^5.0 || ^6.0 -> found symfony/console[v3.4.29, ..., v3.4.47, v4.2.0, ..., v4.4.49, v5.0.0, ..., v5.4.47, v6.0.0, ..., v6.4.17] but these were not loaded, likely because it conflicts with another require. - infection/infection[0.26.12, ..., 0.26.21] require symfony/console ^5.4 || ^6.0 -> found symfony/console[v5.4.0, ..., v5.4.47, v6.0.0, ..., v6.4.17] but these were not loaded, likely because it conflicts with another require.