Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires hprose/hprose-swoole ^2.0.12 -> satisfiable by hprose/hprose-swoole[v2.0.12]. - hprose/hprose-swoole v2.0.12 requires ext-hprose >=1.6.5 -> it is missing from your system. Install or enable PHP's hprose extension.