Multiple Uploads Not Working

I have 2 upload fields on a single form. When I upload a file to the first field only and submit the form, it submits successfully and the image is uploaded to my dropbox. If I upload a file to the second field only and submit the form, it submits successfully and the image is uploaded to my dropbox.

If I try to upload a file to both fields and submit the form, it refreshes the form to the original state. The form is not submitted and the files are not uploaded. No error message is displayed.

https://www.ads-software.com/extend/plugins/gravity-forms-dropbox-uploader/