Your requirements could not be resolved to an installable set of packages. Problem 1 - nette/schema[v1.2.0, ..., v1.2.1] require php >=7.1 <8.1 -> your php version (8.4.0-dev) does not satisfy that requirement. - nette/schema v1.2.2 requires php >=7.1 <8.2 -> your php version (8.4.0-dev) does not satisfy that requirement. - nette/schema v1.2.3 requires php >=7.1 <8.3 -> your php version (8.4.0-dev) does not satisfy that requirement. - nette/schema[v1.2.4, ..., v1.2.5] require php 7.1 - 8.3 -> your php version (8.4.0-dev) does not satisfy that requirement. - nette/schema v1.3.0 requires php 8.1 - 8.3 -> your php version (8.4.0-dev) does not satisfy that requirement. - league/commonmark[2.4.0, ..., 2.4.2] require league/config ^1.1.1 -> satisfiable by league/config[v1.1.1, v1.2.0]. - league/config[v1.1.1, ..., v1.2.0] require nette/schema ^1.2 -> satisfiable by nette/schema[v1.2.0, ..., v1.3.0]. - Root composer.json requires league/commonmark ^2.4 -> satisfiable by league/commonmark[2.4.0, 2.4.1, 2.4.2].