Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ^8.0 but your php version (7.2.34) does not satisfy that requirement. Problem 2 - Root composer.json requires ergebnis/composer-normalize ^2.44 -> satisfiable by ergebnis/composer-normalize[2.44.0]. - ergebnis/composer-normalize 2.44.0 requires php ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 -> your php version (7.2.34) does not satisfy that requirement. Problem 3 - Root composer.json requires nelmio/alice ^3.8 -> satisfiable by nelmio/alice[v3.8.0, ..., 3.13.6]. - nelmio/alice v3.10.0 requires php ^8.0 -> your php version (7.2.34) does not satisfy that requirement. - nelmio/alice[v3.11.0, ..., 3.13.6] require php ^8.1 -> your php version (7.2.34) does not satisfy that requirement. - nelmio/alice[v3.8.0, ..., v3.8.2] require php ^7.3 || ^8.0 -> your php version (7.2.34) does not satisfy that requirement. - nelmio/alice v3.9.0 requires php ^7.4 || ^8.0 -> your php version (7.2.34) does not satisfy that requirement.