Hi there,
I checked my installation of the Essential Grid and they work with no problem. So now I am sure it is something related to your environment. I accessed to your website and installed the WP-ServerInfo. You can check that by going to Dashboard > WP-ServerInfo menu item.
I suggest that you follow the troubleshooting steps below:
- Increase the PHP Memory Limit of your server. Click here for more detailed information and how to increase the PHP memory limit.
- Add a new Test Page and use the Essential Grid shortcode inside the Raw Content element
- Do the same as the previous step but use another grid in Essential Grid instead of the one you are using.
By the way, it is always possible to access the options of the Cornerstone elements even if the Preview is not working like you gave in the screenshot.
You can use the Skeleton Mode by clicking the proper Icon in the Cornerstone:
Thank you.