Hello,
i have exactly the same error:
\([root@stage1 ilias]# php setup/cli.php build-artifacts --yes Building static artifacts ========================= PHP Fatal error: Trait 'ILIAS\GlobalScreen\Scope\ComponentDecoratorTrait' not found in /var/www/html/ilias/src/GlobalScreen/Scope/MainMenu/Factory/AbstractBaseItem.php on line 12 PHP Stack trace: PHP 1. {main}() /var/www/html/ilias/setup/cli.php:0 PHP 2. ILIAS\Setup\CLI\App->run() /var/www/html/ilias/setup/cli.php:39 PHP 3. ILIAS\Setup\CLI\App->doRun() /var/www/html/ilias/libs/composer/vendor/symfony/console/Application.php:149 PHP 4. ILIAS\Setup\CLI\App->doRunCommand() /var/www/html/ilias/libs/composer/vendor/symfony/console/Application.php:273 PHP 5. ILIAS\Setup\CLI\BuildArtifactsCommand->run() /var/www/html/ilias/libs/composer/vendor/symfony/console/Application.php:1009 PHP 6. ILIAS\Setup\CLI\BuildArtifactsCommand->execute() /var/www/html/ilias/libs/composer/vendor/symfony/console/Command/Command.php:255 PHP 7. ILIAS\Setup\CLI\BuildArtifactsCommand->getAgent() /var/www/html/ilias/src/Setup/CLI/BaseCommand.php:85 PHP 8. {closure:/var/www/html/ilias/setup/cli.php:110-116}() /var/www/html/ilias/src/Setup/CLI/BaseCommand.php:65 PHP 9. Pimple\Container->offsetGet() /var/www/html/ilias/setup/cli.php:114 PHP 10. {closure:/var/www/html/ilias/setup/cli.php:133-152}() /var/www/html/ilias/libs/composer/vendor/pimple/pimple/src/Pimple/Container.php:118 PHP 11. ILIAS\Setup\ImplementationOfInterfaceFinder->getMatchingClassNames() /var/www/html/ilias/setup/cli.php:135 PHP 12. ReflectionClass->__construct() /var/www/html/ilias/src/Setup/ImplementationOfInterfaceFinder.php:74 PHP 13. spl_autoload_call() /var/www/html/ilias/src/Setup/ImplementationOfInterfaceFinder.php:74 PHP 14. Composer\Autoload\ClassLoader->loadClass() /var/www/html/ilias/src/Setup/ImplementationOfInterfaceFinder.php:74 PHP 15. Composer\Autoload\includeFile() /var/www/html/ilias/libs/composer/vendor/composer/ClassLoader.php:322 PHP 16. include() /var/www/html/ilias/libs/composer/vendor/composer/ClassLoader.php:444\)