If it can still be controlled by the APP, you may need to check the settings on your Echo APP, try to follow the FAQ for some help: https://www.tp-link.com/en/faq-944.html

what's the browser you are using, it's suggested to use internet explore or google chrome.

Flashing red is abnormal, reset it and reconfigure it

I checked on TP-Link official website, there is no firmware build 180108. You can check the following link: https://www.tp-link.com/ca/download/Archer-C7_V2.html#Firmware Can you do a screenshot for...

Ah, I see the problem. Actually, WPS is a function, if you enable it and then the client device can connect to the Wi-Fi of the rotuer by wps( if the client device also support WPS, normally it...

You can check this FAQ for some help: https://www.tp-link.com/en/faq-1385.html