I have a page that is working just fine. Did “clone” (using the Duplicate Post plugin) to create a copy. When I try to edit the new page with Cornerstone I get: “The preview could not load due to the iframe response being incomplete. This is most often related to a plugin conflict, or customizations introducing a PHP error.”
I am also using Polylang. I believe this worked fine when using the previous version of Cornerstone but not in latest (3.5.4)
I found this thread, is this issue solved or is this the problem I am having?
Duplicate Post 3.2.2