Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires bartlett/umlwriter ^4.0 -> satisfiable by bartlett/umlwriter[4.0.0, ..., 4.2.x-dev]. - bartlett/umlwriter[4.0.0, ..., 4.2.x-dev] require roave/better-reflection ^6.0 -> satisfiable by roave/better-reflection[6.0.0, ..., 6.43.x-dev]. - roave/better-reflection[6.5.0, ..., 6.17.x-dev] require php ~8.1.0 || ~8.2.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - roave/better-reflection[6.18.0, ..., 6.24.x-dev] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - roave/better-reflection[6.0.0, ..., 6.4.x-dev] require php ~8.0.12 || ~8.1.0 || ~8.2.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - roave/better-reflection[6.25.0, ..., 6.25.x-dev] require php ~8.1.0 || ~8.2.0 || ~8.3.2 -> your php version (8.4.0RC1) does not satisfy that requirement. - roave/better-reflection[6.26.0, ..., 6.43.x-dev] require php ~8.2.0 || ~8.3.2 -> your php version (8.4.0RC1) does not satisfy that requirement.