Tried using this for some applications that needed 5-7 documents upload

Tried using this for some applications that needed 5-7 documents uploaded with the form. We ended up have several incomplete applications, when the students were asked for the documents they assured me they had uploaded them and didn't get an error message. Any help with this intermittent issue? If things had worked this would have been such a time saver!

This is a re-post of a comment on Upload to Dropbox with Jotform