i used :
puppet module install puppetlabs-powershell --version 2.3.0
which installed it into:
> /home/dptc/.puppetlabs/etc/code/modules
> └── puppetlabs-powershell (v2.3.0)
then i coped it to
/opt/puppetlabs/puppet/modules
└── puppetlabs-powershell (v2.3.0)
environments are set-up
also puppet version is
Puppet v5.5.16