Skipping all photos due to an error

Hi there,

I am using the 30-day trial and trying to reduce the file size of my existing JPEG images, but it's giving me trouble. It takes FOREVER, but then it doesn't "smush" anything ... it says:

Could not find /nas/content/live/nicolesy/wp-content/uploads/2017/12/l-07-150x150.jpg

It has only "smushed" 1% of my photos so far, and I've left it running for what feels like several hours.

I do use WPEngine, and I use my S3 account to (automatically) store some of my files, so I don't know if that is causing any of the trouble.

Is there something I can do to remedy this?