I’ve had issues with Preview before and they went away for a while but have now returned on some projects and on some pages. I just get a blank white page in RW preview and nothing happens if I try and preview in a browser. I thought with one of my projects that it was due to the amount of things going on on the page but I’ve now encountered it on another of my smaller projects where there is less happening. The live version of these projects is working fine and there are no huge image files involved.
I’m using RW v7.3.3 Stacks v3.2.7b4 Foundation theme v1.7.4 and with no outstanding stack updates to be had on a recent MBP running OSX 10.12.4