Just posting a quick fix in case others bump into this or we need to fix a site again 🙂
We had a strange case of the below code showing up on a front end page of a WPENGINE site…
/wp-content/mu-plugins/wpengine-common/plugin.php on line 264
I tried using Perm-Reload-Apply but that did nothing. The strange part is that it is this section of code related to CDN – and on this site we are not using a CDN. The below snippet is lines 252-272 of that plugin.php file
You can try adding this to wp-config.php – it may hide it.
define( 'WP_DEBUG', false);
define( 'WP_DEBUG_LOG', false );
define( 'WP_DEBUG_DISPLAY', false );
Just add this code to your wp-config.php file..
# Disable the WPE SRCSET CDN to fix a bug
define('WPE_SRCSET_CDN_DISABLED', true);
Hopefully they will solve this conflict soon but in the meantime the above seems to work.