我正在使用AWS RHEL实例Red Hat Enterprise Linux Server 7.5（Maipo）。 Puppet已成功安装。但是，命令
sudo puppet apply /etc/puppet/manifests/site.pp
导致错误：
/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- puppet/util/command_line (LoadError)
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /bin/puppet:7:in `<main>'