Hello i get this message when i´m trying to building a new
language/page on my clients site:
“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.
Origin URL: https://www.xxxxx.com
Preview URL: https://www.xxxx.com/de/xxx/”
And i have NOT update the wordpess to 5.0.2
Cornerstone 3.4.5 is installed.
What to do?