Binding Issue

I just bought the Tv Backlight Lite 3 and when I try and add the device to the app I get this message. My WiFi is dual compatible for 5 and 2.4. I’ve restarted the device, my phone, and router. Anyone have a fix for this issue?

I just bought the Tv Backlight Lite 3 and when I try and add the device to the app I get this message. My WiFi is dual compatible for 5 and 2.4. I’ve restarted the device, my phone, and router. Anyone have a fix for this issue?