Cornerstone error on preview/edit

Currently unable to edit pages through Cornerstone. Getting generic message “The preview could not load. This is most often related to a plugin conflict or aggressive page cacheing. Checking the developer console for errors could indicate what went wrong.”

Several errors in the console including AJAX rejection. I’ve tried deactivating the one other plugin that was activated besides Cornerstone but no luck.

Hi There,

Thanks for writing in! First of all, please follow our troubleshooting guide here (

You can also install the following plugin ( and then head over to Dashboard -> WP-Serverinfo and check the following information.

PHP version
PHP Max Script Execute Time

We do recommend PHP v5.6.32 or higher and max script execution time 120 or higher to run Cornerstone smoothly.

Let us know how it goes.

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