QOS on RBR20

[JYJY]

I found the QoS settings by manually adding /QOS_main.htm to my login

I cant seem to change any settings
400 Bad Request
This server does not support the operation requested by your client. 

ir similar messages.

I would like to prioritise my WORK FROM HOME PC over the family Netflix streaming as I present on Zoom for a living.

Any way to manage this?

[CrimpOn]

I also tried to add a QoS rule using the MAC address of my PC and got the same rejection.

QoS on the Orbi product, if it exists at all, appears to be a closed box where the user has no control.