[quote=calvinyeap,May 28 2020, 03:44 PM]
Unfortunetely unable to downgrade the firmware.
"Upgrade failed. Please select the latest version of firmware to upgrade."
I also tried setting this manually, with only Internet VLAN and disable IPTV VLAN but it won't connect to the Internet.

Anyone found a solution to this?

[/quote

Set the VLAN/IPTV mode as “Custom” instead of “Malaysia-TM Unifi”; put in the internet VLAN ID as 500, priority 0; and tick the 802.1Q Tag. You need to disable the IPTV VLAN button at the bottom.
Anyone knows if this really works?

I'm using unifi but I suppose this custom setting would also work for unifi. After using this custom preset, are we able to use the second port to a switch? Anyone tried this? Because I want to connect the other deco to this network switch.