Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires simplesamlphp/simplesamlphp-test-framework ~1.11 -> satisfiable by simplesamlphp/simplesamlphp-test-framework[v1.11.0]. - azjezz/psl[4.2.0, ..., 4.3.0] require ext-sodium * -> it is missing from your system. Install or enable PHP's sodium extension. Alternatively you can require one of these packages that provide the extension (or parts of it): Keep in mind that the suggestions are automated and may not be valid or safe to use - paragonie/sodium_compat_ext_sodium - juspay/expresscheckout-php-sdk Express Checkout SDK for PHP allows easy integration with Juspay's EC payments as a service platform - vufind/vufind A flexible discovery layer. - maglnet/composer-require-checker[4.19.0, ..., 4.20.0] require azjezz/psl ^4.2.0 -> satisfiable by azjezz/psl[4.2.0, 4.2.1, 4.3.0]. - maglnet/composer-require-checker 4.21.0 requires php ~8.4.0 || ~8.5.0 -> your php version (8.3.30) does not satisfy that requirement. - simplesamlphp/simplesamlphp-test-framework v1.11.0 requires maglnet/composer-require-checker ^4.19 -> satisfiable by maglnet/composer-require-checker[4.19.0, 4.20.0, 4.21.0]. 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-sodium` to temporarily ignore these required extensions.