Solucione ese error. Descargue los archivos y despues de configurarlo me aparece el siguiente error:
PHP Fatal error: Uncaught Error: Class ‘SIU\Chulupi\util\u’ not found in /usr/local/proyectos/g3w3/src/siu/bootstrap.php:298
Stack trace: #0 /usr/local/proyectos/g3w3/src/siu/bootstrap.php(56): siu\bootstrap->configurar_autoloader(true) #1 /usr/local/proyectos/g3w3/src/siu/util/consola/run.php(4): siu\bootstrap::registrar_autoload(true) #2 {main}
thrown in /usr/local/proyectos/g3w3/src/siu/bootstrap.php on line 298
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Nothing to install or update
Generating autoload files
composer run-script post-install-cmd -d ./vendor/siu-toba/framework/
Deprecation warning: require.siu-toba/Numbers_Words is invalid, it should not contain uppercase characters. Please use siu-toba/numbers_words instead. Make sure you fix this as Composer 2.0 will error.
Deprecation warning: require.guiguiboy/PHP-CLI-Progress-Bar is invalid, it should not contain uppercase characters. Please use guiguiboy/php-cli-progress-bar instead. Make sure you fix this as Composer 2.0 will error.
Deprecation warning: require.siu-toba/Structures_Graph is invalid, it should not contain uppercase characters. Please use siu-toba/structures_graph instead. Make sure you fix this as Composer 2.0 will error.
Deprecation warning: require-dev.greenlion/PHP-SQL-Parser is invalid, it should not contain uppercase characters. Please use greenlion/php-sql-parser instead. Make sure you fix this as Composer 2.0 will error.
Do not run Composer as root/super user! See How do I install untrusted packages safely? Is it safe to run Composer as superuser or root? - Composer for details
bower install --allow-root
SIU\Guarani\RestHooks\RestHookSanaviron::changeJsonbToJson
SIU\Guarani\Scripts\Composer::postInstallCmd