We are glad that it work.
You can still check for the solution if you get it in future.
Sometimes the preview loads, but this red error notification appears in the top right. Something is preventing the HTML tag from being closed. This is usually indicative of a fatal PHP error that halts output. We’d advise testing for a plugin conflict (below).
How to test for a plugin conflict
With many of these problems being related to plugins, testing for a conflict is often the fastest way to get to the bottom of things. Here’s a simple plugin conflict testing process:
Disable all plugins except Cornerstone. If you’re using Pro, disable all plugins.
Test to see if the issue remains.
If things are working again, reactivate one of your plugins
Test to see when the problem reappears
If it does, you know the plugin you most recently activated is causing a problem. If it doesn’t, go reactivate another plugin.
Thanks