I have just started to rebuild my site from the ground up, and decided it would be fun to build off of the demo content.
The only things I have done is loaded the demo, and set up my TypeKit, and Cornerstone is now not functioning.
The preview could not load. This is most often related to a plugin conflict or aggressive page cacheing. Checking the developer console for errors could indicate what went wrong.
Please somebody point me in the right direction, or log in to my site to see what the heck I can do.