Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=8.1 but your php version (7.3.33) does not satisfy that requirement. Problem 2 - Root composer.json requires knplabs/snappy-core, it could not be found in any version, there may be a typo in the package name. Problem 3 - Root composer.json requires phpunit/phpunit ^11.4 -> satisfiable by phpunit/phpunit[11.4.0, 11.4.1]. - phpunit/phpunit[11.4.0, ..., 11.4.1] require php >=8.2 -> your php version (7.3.33) does not satisfy that requirement. Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details. - It's a private package and you forgot to add a custom repository to find it Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

Process completed with exit code 2.