I have recently updated an old site that is in development, to Pro theme version 2.5.5.
Now when I open a page in cornerstone I cannot see any of the elements in the preview unless I go to skeleton mode.
I have disabled all plugins and the issue persists, also increased memory limit to 256M and renamed the htaccess file.
It is running PHP version 5.6 because of our other sites on the server, but tried updating to a newer one with no luck anyway.
There is no caching plugin installed so running out of options, any ideas?