Your requirements could not be resolved to an installable set of packages. Problem 1 - laminas/laminas-diactoros 2.4.1 requires php ^7.1 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-diactoros[2.5.0, ..., 2.6.0] require php ^7.3 || ~8.0.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-diactoros[2.7.0, ..., 2.14.0] require php ^7.3 || ~8.0.0 || ~8.1.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-diactoros[2.15.0, ..., 2.17.0] require php ^7.4 || ~8.0.0 || ~8.1.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-diactoros[2.18.0, ..., 2.25.2] require php ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - laminas/laminas-diactoros 2.26.0 requires php ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - Root composer.json requires laminas/laminas-diactoros ^2.4.1 -> satisfiable by laminas/laminas-diactoros[2.4.1, ..., 2.26.0].

php-http/discovery 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.php-http/discovery [true|false]" to enable it (true) or disable it explicitly and suppress this exception (false) See https://getcomposer.org/allow-plugins