Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires psr/log ^3 -> satisfiable by psr/log[3.0.0]. - psr/log 3.0.0 requires php >=8.0.0 -> your php version (7.2.34) does not satisfy that requirement. Problem 2 - psr/log 3.0.0 requires php >=8.0.0 -> your php version (7.2.34) does not satisfy that requirement. - sabre/dav 4.5.0 requires psr/log ^1.0 || ^2.0 || ^3.0 -> satisfiable by psr/log[3.0.0]. - Root composer.json requires sabre/dav ~4.5.0 -> satisfiable by sabre/dav[4.5.0].