Your requirements could not be resolved to an installable set of packages. Problem 1 - league/mime-type-detection[1.0.0, ..., 1.3.0] require php ^7.2 -> your php version (8.2.9) does not satisfy that requirement. - league/mime-type-detection[1.4.0, ..., 1.13.0] require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension. - league/flysystem-local 3.15.0 require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension. - ecphp/laravel-cas dev-main requires laravel/framework ^9 || ^10 -> satisfiable by laravel/framework[v9.0.0, ..., v9.52.15, v10.0.0, ..., v10.21.1]. - laravel/framework[v9.36.4, ..., v9.52.15, v10.0.0, ..., v10.21.1] require league/flysystem ^3.8.0 -> satisfiable by league/flysystem[3.8.0, ..., 3.15.1]. - laravel/framework[v9.18.0, ..., v9.36.3] require league/flysystem ^3.0.16 -> satisfiable by league/flysystem[3.0.16, ..., 3.15.1]. - laravel/framework[v9.0.0, ..., v9.17.0] require league/flysystem ^3.0 -> satisfiable by league/flysystem[3.0.0, ..., 3.15.1]. - league/flysystem[3.0.0, ..., 3.14.0] require league/mime-type-detection ^1.0.0 -> satisfiable by league/mime-type-detection[1.0.0, ..., 1.13.0]. - league/flysystem[3.15.0, ..., 3.15.1] require league/flysystem-local ^3.0.0 -> satisfiable by league/flysystem-local[3.15.0]. - Root composer.json requires ecphp/laravel-cas dev-main -> satisfiable by ecphp/laravel-cas[dev-main]. 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-fileinfo` to temporarily ignore these required extensions.