Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires ergebnis/data-provider ^3.2.0 -> satisfiable by ergebnis/data-provider[3.2.0]. - ergebnis/data-provider 3.2.0 requires php ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. Problem 2 - Root composer.json requires ergebnis/license ^2.4.0 -> satisfiable by ergebnis/license[2.4.0]. - ergebnis/license 2.4.0 requires php ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. Problem 3 - Root composer.json requires ergebnis/php-cs-fixer-config ^6.36.0 -> satisfiable by ergebnis/php-cs-fixer-config[6.36.0]. - ergebnis/php-cs-fixer-config 6.36.0 requires php ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. Problem 4 - Root composer.json requires ergebnis/phpunit-slow-test-detector ^2.15.1 -> satisfiable by ergebnis/phpunit-slow-test-detector[2.15.1]. - ergebnis/phpunit-slow-test-detector 2.15.1 requires php ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. Problem 5 - Root composer.json requires vimeo/psalm ^5.26.1 -> satisfiable by vimeo/psalm[5.26.1]. - vimeo/psalm 5.26.1 requires php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. Problem 6 - vimeo/psalm 5.26.1 requires php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0-dev) does not satisfy that requirement. - psalm/plugin-phpunit 0.19.0 requires vimeo/psalm dev-master || ^5@beta || ^5.0 -> satisfiable by vimeo/psalm[5.26.1]. - Root composer.json requires psalm/plugin-phpunit ~0.19.0 -> satisfiable by psalm/plugin-phpunit[0.19.0]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.