Well if it´s now up and running can you explain why the message persists on the Avast UI ?
You says that avast had problems with the secure DNS server and now it´s up and running so what shall we do when we still have the message ? The problem started 2015.10.03 on my computer is this about the date that your server wasn´t working properly. It would be helpful if that was confirmed . Plus any suggestions to get rid of the message.