Thumbnails are not appearing for images in an S3 bucket. Is there an Extra for this?
What version of MODX are you using?
Maybe try this:
Mate that normally happen if the uploaded file is too big, thy with a lighter file and see it it works.
What I saw using it is that S3 is very slow and it’s even worse with large images or too many images in one folder.
Not a god experience really!