Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires mammatus/app dev-master -> satisfiable by mammatus/app[dev-master]. - mammatus/app dev-master requires ext-pcntl ^8.2 -> it is missing from your system. Install or enable PHP's pcntl extension. To enable extensions, verify that they are enabled in your .ini files: - C:\tools\php\php.ini You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode. Alternatively, you can run Composer with `--ignore-platform-req=ext-pcntl` to temporarily ignore these required extensions. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Process completed with exit code 2.