XR500 - So can anyone explain this? NEED HELP!

[648 USD - Wasted on DumaOS]

Uncaught TypeError: Cannot read properties of undefined (reading 'append')



also  - devices cannot connect to wifi , only things that work are if the devices are ethernet wired into the XR500.

Also ill list my device list as well
Basically i need help , as other things are becoming an issue, as in now the 5G Band is no longer showing up on my wifes smart tv (which was previously connected to the 5G Band) 

Take your time .. please... i can waitt.... 
If anyone else knows or has any ideas or questions. Pplease send help lol

[Netduma Fraser]

I can't see any of the pictures but make sure you're not using a browser based Adblocker on the interface and you're not connecting to the interface using HTTPS, it should be HTTP.

Are all devices unable to connect via WiFi? So you have Smart Connect disabled for WiFi?