As a follow up to this, and reading up on more community forums, it would seem the suggestion is to increase the file size limits in php.ini and/wp-config. Pantheon already set the maximum limit as 256m in php.ini, and setting ” define(‘WP_MEMORY_LIMIT’, ‘512M’); ” in wp-config does nothing to resolve.
I do get ” Backtrace too big to show ” in the Pantheon error log, with a file size limit being exceeded, but can’t find the answer to this. Any help would be greatly appreciated.