Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

Error: Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

Error: Facter: error while resolving custom facts in /opt/puppetlabs/puppet/cache/lib/facter/package_provider.rb: Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

uname -a

Linux ip-10-0-42-40 4.4.0-1047-aws #56-Ubuntu SMP Sat Jan 6 19:39:06 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

sudo -i

wget https://apt.puppetlabs.com/puppet6-release-xenial.deb

dpkg -i puppet6-release-xenial.deb

apt update

apt install -y puppetserver

source /etc/profile.d/puppet-agent.sh

puppet config set server $(hostname -f)

puppetserver ca setup

systemctl start puppetserver

puppet module install puppetlabs-stdlib

puppet agent -t

Info: Using configured environment 'production'

Info: Retrieving pluginfacts

Info: Retrieving plugin

Notice: /File[/opt/puppetlabs/puppet/cache/lib/facter]/ensure: created

...

Info: Retrieving locales

Info: Loading facts

Error: Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

Error: Facter: error while resolving custom facts in /opt/puppetlabs/puppet/cache/lib/facter/package_provider.rb: Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

Info: Caching catalog for ip-10-0-42-40.us-west-2.compute.internal

Info: Applying configuration version '1561145391'

Info: Creating state file /opt/puppetlabs/puppet/cache/state/state.yaml

Notice: Applied catalog in 0.02 seconds

facter -p os

2019-06-21 19:36:32.606934 ERROR puppetlabs.facter - error while resolving custom facts in /opt/puppetlabs/puppet/cache/lib/facter/package_provider.rb: Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given)

{

  architecture => "amd64",

  distro => {

    codename => "xenial",

    description => "Ubuntu 16.04.3 LTS",

    id => "Ubuntu",

    release => {

      full => "16.04",

      major => "16.04"

    }

  },

  family => "Debian",

  hardware => "x86_64",

  name => "Ubuntu",

  release => {

    full => "16.04",

    major => "16.04"

  },

  selinux => {

    enabled => false

  }

}

/opt/puppetlabs/puppet/bin/ruby /opt/puppetlabs/puppet/cache/lib/facter/package_provider.rb

Traceback (most recent call last):

	15: from /opt/puppetlabs/puppet/cache/lib/facter/package_provider.rb:11:in `<main>'

	14: from /opt/puppetlabs/puppet/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'

	13: from /opt/puppetlabs/puppet/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'

	12: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/type/package.rb:9:in `<top (required)>'

	11: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/type/package.rb:10:in `<module:Puppet>'

	10: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/metatype/manager.rb:127:in `newtype'

	 9: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:215:in `loadall'

	 8: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:79:in `loadall'

	 7: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:79:in `each'

	 6: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:81:in `block in loadall'

	 5: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:66:in `load_file'

	 4: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/autoload.rb:66:in `load'

	 3: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/provider/package/gem.rb:1:in `<top (required)>'

	 2: from /opt/puppetlabs/puppet/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'

	 1: from /opt/puppetlabs/puppet/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'

/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/provider/package_targetable.rb:23:in `<top (required)>': Could not autoload puppet/provider/package/gem: superclass must be a Class (Module given) (Puppet::Error)

puppet module uninstall puppetlabs-stdlib

puppet agent -t

Info: Using configured environment 'production'

Info: Retrieving pluginfacts

Info: Retrieving plugin

Info: Retrieving locales

Info: Caching catalog for ip-10-0-42-40.us-west-2.compute.internal

Info: Applying configuration version '1561145919'

Notice: Applied catalog in 0.05 seconds

uname -a

Linux fy4y57a54szfeln 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux