Unable to connect to VPN using Xfinity XB7 gateway

Hello,

I have been using Cicsco Anyconnect to VPN to my work, but from 2 days ago it suddenly stopped working. I am able to VPN using my mobile hotspot so its clearly an issue with the Xfinity gateway.

I checked the firewall setting and its set to low. I noticed in the forum other people with Xfinity wifi are facing similar problems but I could not find a solution.

P.S Xfinity AI assistant in the app is useless. Couldnt even understand my problem. 

Can anyone please help?