After a Divi theme update, one of my sites started breaking when displaying the shop page. The error I was seeing on the front end said…
“The site is experiencing technical difficulties’
No other error information was available in the WordPress dashboard.
Switching wp_debug to ‘true’ in wp-config.php revealed that I had a call to undefined method ET_Core_Cache_File::set_cache_data() in /Divi/includes/builder/core.php.
I fixed the issue by finding the /wp-content/cache/ folder and deleting it.