Submissions were not forwarded to Dropbox

In addition the last two participants have not been uploaded to Dropbox yet.

Please keep in mind that Submissions that are marked as Incomplete Payments will not be forwarded to Dropbox. If you wish to see these Submissions / Uploaded files in Dropbox, regardless if an actual payment has been received or not, you can manually complete the submission.

I'll link the guide here again along with the screenshot on how to do so:

Complete guide: How-to-view-incomplete-payments 

Below is an important snippet from the guide above:

Note: Completing a submissions will NOT process any payment as there was no payment information to begin with. The system will simply treat this as a regular submission so it can be included on form reports, and that email alerts can be fired off as usual.