The name, filetype and size not being displayed is a known bug.
The issue is that customers uploading files to S3 usually don’t set CORS headers to allow forestadmin to load them with an ajax request, and we can’t know the file type / size without that.
Actually, we have a pull request waiting to be merged to “solve it” by hiding the size, and guessing the filetype and name from the URL.
Hopefully it should be done tomorrow or the day after.
However, I see that the preview is broken on your screenshot, and it should work even without the fix.
When you click on the image, does the image load?