@Evian98 What's your Deco E4 hardware version and firmware version?

@screennamescree I think your backup is failed because of mixing new + old deco units in your network.

@Bert1986 What's your AC model? Both are same model? Have u tried after disable Mesh Technology from Deco App on your AC's ? You can create IoT Network for your IoT devices and then connect your AC's...

@PHenry You have to download firmware 1.1.6 from the link and install it directly from the Web UI by login your Deco account just go to 192.168.68.1

@Rassel120 Hmmm TP-LINK is not focusing on this hardware version idk why @SayeemAhmed is also using same hardware version V1.30 and he is complaining since many years. Let me tell you one thing...

@Rassel120 What's your Deco X50 hardware version and firmware version?