I have same problem and also affects Prime. I am also connected to router by cable and do not have a problem with anything else. I have no problem watching via my XBox or smart TV so looks like a Virgin problem to me.
According to Customer Service this is a known problem currently with IT to resolve. I reported on Fri 15th May.
Problem can be resolved 'on the day' by a Reset but this is not an acceptable solution of course.
The Netflix error is tvq-pb-101 (5.2.12) which Netflix says 'typically points to information stored on your device that needs to be refreshed' with a solution of restating the box which I do everyday since my box seems to be forgetting 'this information' every time I put it into standby!
Another explanation suggests an HDCP issue with an intermediate bit of kit such as a soundbar which indeed I have. My XBox is also connected via the soundbar without issue but I will investigate further.
Tx Eeeps for response. I tried this early on in my investigation but no change.
Its not a Netflix problem per se as it also happens with Prime. In both cases I get the front screens listing the programmes; it's just that I can't play them unless I do a reset after every standby. I think it's a HDCP problem which I'm currently researching.
We have just moved to V6 from TiVo, and every day all on demand services don’t work and require a box restart. Such a shame, on demand on other devices work no problem and so related to the box itself. I have tried bother wireless and Ethernet, played with power saver settings and various reboots of the modem and router too, to no avail.
So annoying as had such high hopes for the V6, which is just a week old today!