I’ve have the latest X Theme (8.08) and Cornerstone plugin (5.09).
After the update I started getting the ‘Preview could not not load’ message so I removed my cache plugin and the editor was again available. However, now when I edit my home page the fonts are huge and the slider that sits at the top is no longer showing up either in the righthand side of the page or in the left hand side where you can see all of your blocks etc.
I’ve not made any changes to the page or saved it for fear that the slider will be removed from the live site.
Any help appreciated as I can no longer edit my home page safely.