Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^5.7 -> satisfiable by phpunit/phpunit[5.7.0, ..., 5.7.27]. - phpunit/phpunit[5.7.0, ..., 5.7.27] require php ^5.6 || ^7.0 -> your php version (8.1; overridden via config.platform, actual: 8.1.30) does not satisfy that requirement.

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^5.7 -> satisfiable by phpunit/phpunit[5.7.0, ..., 5.7.27]. - phpunit/phpunit[5.7.0, ..., 5.7.27] require php ^5.6 || ^7.0 -> your php version (8.0; overridden via config.platform, actual: 8.0.30) does not satisfy that requirement.

Process completed with exit code 2.

Process completed with exit code 127.

kylekatarnls/update-helper contains a Composer plugin which is blocked by your allow-plugins config. You may add it to the list if you consider it safe. You can run "composer config --no-plugins allow-plugins.kylekatarnls/update-helper [true|false]" to enable it (true) or disable it explicitly and suppress this exception (false) See https://getcomposer.org/allow-plugins