Thanks for the article! I've never heard of the Wigner's friend problem before, fascinating.
I only have a B.S. in physics with some classes in Quantum Mechanics, so I think I'm only marginally qualified to comment. I do feel like this article is a little bit sensational, and I wish they had done more to pick apart the original experiment. I think the real take away here is that some parts of our model for quantum mechanics is not correct, or the constraints for that model are not correct.
We see the same thing time and again through history where a model with certain constraints at a different level of aggregate is disproven at either a smaller or higher scale. Take for example how Newtonian physics doesn't scale to the subatomic in the small, and also not at relativistic speeds in the big. The model is correct for a particular set of constraints, and obviously still taught in schools as it is an extremely effective approximation for those constraints.
My suspicion is that here we are getting a glimpse into the future of yet another model that has yet to be discovered. Perhaps even a brief look mechanics of the Grand Unified Theory?