Hi all,
Just a heads up that the Quality of Service administrative screen displays an error after upgrading to firmware 4.4.5.2_BT (see screenshot)
This is on a 2865ac router.  The issue persists after reboots, clearing browser cache/cookies, and trying alternative browsers.
If it's of any value I can confirm that we weren't using QoS in any way prior to the firmware upgrade, so all settings would have been at their defaults.
I definitely didn't notice any problem prior to 4.4.5.2, and I'm in the control panel regularly.
Thanks!

I can confirm I'm getting the same on my 2865 running 4.4.5.2

I have the same issue on a 2927ac running firmware 4.4.5.5

I can confirm the same behaviour on 2865ax

On the previous firmware (4.4.5.1_BT I believe) it was also working correctly and the page was accessible.

Hi there,

Getting exactly the same problem. Have just finished factory resetting my router and redoing all the settings... 

In a way I am almost glad that I have found this post. For the last few days I have thought I was going insane and that I had done something bad to my Vigor 2927ac
Even installed the latest firmware update, which turned out to be a critical one. I am now running on version 4.4.5.5 and I am still getting the same issue with every web browser I try when accessing my router.

As as aside, I am also noticing a recent decrease in my overall Internet speed. I should be getting around 900Mbps with my Virgin Business Media connection and I am only getting 379Mbps in and 97Mbps out
It is like hardware acceleration is no longer functioning.

Hopefully Draytek will soon fix the problem...

Has anyone tried loading an earlier firmware where this page was working?