Hi Guys,
I was having the same issue. IN my configuration, I am using Binhex-DelugeVPN as a proxy server for my Sonarr and Radarr. My PIA server is set to CA TORONTO (look in /appdata/binhex-delugevpn/openvpn for a .ovpn file). It seems CA TORONTO stopped working couple of weeks ago.
The recommended solution is to change to another server that support port forwarding. I am currently using "DE Berlin.ovpn" with "STRICT_PORT_FORWARD = YES" and it works just fine. Other people have reported success with other European servers - DE Frankfurt, Sweden, Swiss, etc.
If you look at Q10 and Q11 in Binhex's VPN FAQ, Binhex recommends changing the PIA's endpoint rather than setting "STRICT_PORT_FORWARD = no". It also describes how to change the endpoint.
Enjoy!