Suddenly blocking VPN

Comcast appears to have decided to block my VPN mid morning today. I’ve been using this commercial VPN for years. All of the sudden this morning, my connection dropped and I can’t reconnect. After testing with multiple PCs I found that if I use my phone’s wifi hotspot and cellular data I can connect, but when I am going through xfinity I cannot connect at all.

So I’ve eliminated my computer and I’m also connecting directly to my cable modem, which I’ve rebooted. And I know my account at the vpn is good since I can use it find via my cell data. So…why is this happening and how do I get it fixed?