Unable to log in to Cox when my VPN is on

I've contacted ExpressVPN and am trying the different things they suggest. I'll post again here when I reach the end of the line with ExpressVPN.

ExpressVPN told me today that they're unable to solve the problem on their end.

Hello, due to security reasons.  We do restrict access to accounts with IP addresses outside the US. It may be that the VPN in use, may have a path outside the US.  

Yes, that could be the problem. I live in Los Angeles, though, and I'm choosing Los Angeles as the location for the ExpressVPN server I'm using.

Although you may have selected Los Angeles, you would still want to verify the route the IP is taking.  If any of the IP's are located outside the US.  Our server will still see it as inbound from outside the US. 

Good point. I don't know much about VPNs, but I thought that one of the purposes of using one is to protect username and password information when signing in to a website. Not allowing a VPN to access an online account will protect against hackers, but I think preventing a VPN from being used exposes legitimate users to another type of risk. 

Services like ExpressVPN can be useful if you need to disguise or otherwise alter the origin of your Internet traffic but they offer no safety what so ever.  With respect to login security however, this present a risk of account compromise.  If I watch you sign into your account from home then 5 minutes later you're accessing your account Germany I'm going to assume your password is stolen and shut down the account until the problem can get sorted out.

Most providers incorporate layers of security with respect to authentication processes one of which geolocation.  The example I described above is a text book case of a phenomenon we call an impossible travel anomaly.

Blocking VPN connections for account authentication is far safer for the user.