Looking for info/help running ProtonVPN on Slackware64-current

I've been using ProtonVPN now for about two weeks (paid account). I have my router connect to their servers and everything works but is slow. I have been trying to get their protonvpn_cli application to work directly on my Slackware box but no joy so far. It installs fine with pip3, initializes without a hitch but when I try to connect it just says that it encountered an "error" and to check my internet connection (which is fine). After a connection attempt using the protonvpn app I lose all ability to access dns servers. Browser(s) just say that they can't resolve the address. All is fine after rebooting. Their help desk people and documentation are all apt-get centric. Of their prerequisites the only one that I didn't get was network-manager-openvpn-gnome so, fingers crossed I installed NetworkManager-openvpn from Slackbuilds.

So, I'm curious if anyone has gotten protonvpn_cli to run on a Slack64-current box??? If so I'd like to know how. Many thanks if you have experience.