As noted I have 3 XE75 units. There is no Internet Backup option in my Deco App. Nothing is listed in my app in either of the places listed below. Open your Deco app, and go to More > Advanced >Intern

Is there a general list of what some of these errors mean in my Deco Log file. For instance does the Connection: Close entry mean that the Deco has closed the connection to the Modem or has the issue