Compatibility issue Nord VPN and AVAST

I cannot download my gmail,
However this can be corrected by either.

  1. Turning off my VPN connection (Nord) OR
  2. Turning off Mail Shield in my AV program (AVAST)

This is a section of the Event log when mail is blocked.
Download command failed with exception: MailClient.Accounts.ConnectionException: Failed opening connection to server.
09:58:34.088|026| —> System.Net.Sockets.SocketException (10049): The requested address is not valid in its context.
I can see an old question involving certificates, but this is from 2020 !!
Hope someone can help
Steve