PHPX安装后再安装swoole_zookeeper 报错

[MouseOrCat]

php版本是8.1的，我安装好了phpx 后在 ext-zookeeper下 执行 phpx build -v -d 命令后报错：
PHP Fatal error: Uncaught TypeError: Return value of "phpx\Command\Build::execute()" must be of the type int, "null" returned. in phar:///usr/local/bin/phpx/vendor/symfony/console/Command/Command.php:301
Stack trace:
#0 phar:///usr/local/bin/phpx/vendor/symfony/console/Application.php(1040): Symfony\Component\Console\Command\Command->run()
#1 phar:///usr/local/bin/phpx/vendor/symfony/console/Application.php(301): Symfony\Component\Console\Application->doRunCommand()
#2 phar:///usr/local/bin/phpx/vendor/symfony/console/Application.php(171): Symfony\Component\Console\Application->doRun()
#3 phar:///usr/local/bin/phpx/console.php(17): Symfony\Component\Console\Application->run()
#4 /usr/local/bin/phpx(10): include('...')
#5 {main}
thrown in phar:///usr/local/bin/phpx/vendor/symfony/console/Command/Command.php on line 301

这个错误我真不知道该怎么解决了，我换成8.0的版本也不行，烦请大佬帮我看一下