Hello. I've been using this router and an extender in my house without issue for almost a year but today suddenly my iPhone and Mac book could still discover and connect to the wifi but would no longer load anything. Every other device in my home is connecting fine (Smart TVs, Firesticks, etc.) but despite rebooting all of the devices concerned, resetting my network settings and setting up the connections on my phone and Macbook I cannot get anything to load on them while connected to my Archer.

My phone gives the "No Internet Connection" Message and the status page for the router shows: Disconnected, Unknown failure reason. Please make sure your configuration is correct.

Any help would be really appreciated as I've been trying to Google this problem away to no success over the past few hours. Thank you.