Image file path

I have suddenly started having a problem similar to this however I do not have a define( 'UPLOADS', 'files' ); line in my wp-config.php file,which was the fix in that case. The sites in my network use (as you might guess) the Divi theme – and images added through Divi modules still appear, but it seems that any images in regular WordPress are somehow looking for a "files" path rather than the regular wp-content/uploads e/g/ I just noticed this today after trying to update plugins. However, reverting to a pre-update backup did not fix the issue. I have activated a support token.