They have been rolling out ad-blocker detection with warning popups telling you to disable it. Mine were skippable the first few times but that lead to a final 3 warnings with the player refusing to load after. They seem to be doing a lot of A/B testing with the system currently.

Seems to be not hitting every user the same way. I also did not have any direct message about ad blockers, but I did notice videos not loading correctly and requiring a page refresh to work. Updating uBlock seemed to fix that issue. It was only afterwards that I heard of others having problems.

In my experience, it ahs not been hitting super users. But somehow they have been targeting people with adblock installed by someone else.

My parents both have been targeted and had to instruct them on how to refresh the quick updates, which has not been easy.