Problem 2 – Root composer.json requires PHP extension ext-yaml * but it is missing from your system. Install or enable PHP’s yaml extension. Problem 3 – Root composer.json requires fourover/sdk 0.1.3 -> satisfiable by fourover/sdk[v0.1.3]. – fourover/sdk v0.1.3 requires ext-yaml * -> it is missing from your system. Install or enable PHP’s yaml extension.
Execute 2 commands below
brew install libyaml pecl install libyaml
Result of the execution of the commands above
Build process completed successfully Installing '/usr/local/Cellar/[email protected]/8.0.21/pecl/20200930/yaml.so' install ok: channel://pecl.php.net/yaml-2.2.2 Extension yaml enabled in php.ini