Unable to connect VPN to specific websites and Spectrum App

The vpn will not connect with Ticketmaster, opentable, cvs., mychar, and particularly with spectrum. All spectrum apps and email addresses are no go.With Spectrum app, I automatically get message that says HTTP Proxy Unsupported. To use spectrum news (for example), please turn off the proxy and try again. In every case, I must first turn off the vpn, use these websites or apps, then reengage the vpn. Help.

Should be mychart in previous message