I am having the same issue. WebUI won't load. I have PIA. Edit: I fixed it. PIA took port forwarding away from the location I was set up with. I had to go to PIA website and download a new file. Go to OpenVPN Configuration Generator section on PIA website and select another location that has port forwarding and generate that file. and swap out the .opvn file in \appdata\binhex-qbittorrentvpn\openvpn I was using Toronto and changing to Montreal fixed it.