Android Error: "Can't connect to always-on VPN"

On my S9+ it seems there’s some sort of configuration mix up. I have the app installed and when its turned ON, I can’t reach websites. Full Tunnel is enabled.
Now on the Android system settings I have done 2 things:

  1. Under VPN settings I have enabled “Always-on VPN” with “Block connections without VPN” disabled

  2. Under Private DNS settings I have put

It is with these configurations I get the message saying “ is set up to stay connected all the time, but it can’t connect at the moment. Your phone will use a public network until it can reconnect to”

But weirdly the status page shows all working fine with DNS over TLS

The URL is at

If I switch ON the app the status page just sits on “Checking”.