Hello There,
Thanks for writing in!
Loading the preview took longer than expected. There may be script conflicts on this page
This is just a Cornerstone notice and cannot be considered as an error. A Cornerstone error display in red and this is in grey color. It just let you know why it took a little longer to load the page in the preview area. It may have been caused by some scripts or conflicts as what the notice is saying.
To get rid of this notice, you may need to check several things.
1.) Please make sure that there are no JS errors on the page.
2.) When you insert a custom html in a text element or raw content element, it should be a valid and correct code. Any invalid html code or incorrect and even unclosed html tag may cause an issue.
3.) And you could do testing for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Please let us know how it goes.