After you've fixed the colour space, try these solutions: http://www.damiensymonds.net/2015/09/black-boxes-and-other-weird-behaviour.html
I'm not optimistic, though, to be honest.
That's ok, I was actually going to blame the calibrator, but if you don't have one, it can't be the culprit
What about if you open a jpeg file into Photoshop? (No ACR involvement). Does it look ok? Is this problem only happening with raw files?