Thank you for writing in, please do the following:
- Ensure that you are fully up to date. WordPress, Theme, and Cornerstone (Version Compatibility)
Clear all the site caches (plugin, server-side, CDN, and browser's cache) so that the code from the latest release is always in use. This will help you to avoid any potential errors. While you're at it, please deactivate this caching feature while we tackle this issue.
Test 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.
Contact your hosting provider to increase your allocated memory limit or do it yourself by adding this code in your wp-config.php file.
define( 'WP_MEMORY_LIMIT', '512M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );
You can add it before the line:
/* That’s all, stop editing! Happy blogging. */
Increasing PHP Memory Limit
After doing all this and if the issue persists, please provide us the site URL and credentials in a Secure Note so we can take a closer look.