After downloaded Mac OS High Sierra today, PIA seemed to connect to servers, but would not allow web sites to load. I resolved my issue by completely removing and reinstalling PIA.
I have been trying to figure out what the problem is. I'm going to uninstall/reinstall and I'll check back to verify whether or not it works for me.Thanks for posting!
Uninstalled per PIA instructions for macOS and reinstalled latest. Connection to sites and via apps is ok in the really short periods that PIA actually stays connected regardless of endpoint selected. PIA is now unusable on macOS High Sierra. Have tried both UDP and TCP and PIA suggested troubleshooting steps for connection dropouts to no avail. Not impressed. Will follow posts for a while to see if PIA fixes this issue or someone finds a workaround - if not it will be time to find another VPN provider.
The problem may be the presence of malware on your computer [malware site removed]