404 error when trying to open docx and pdf files

When I try opening the files my client has attached to an application form he submitted I'm getting error 404 Unfortunately, the page you were looking for could not be found. It may be temporarily unavailable, moved or no longer exists. Please check your spelling and retry.  Screen shot below...

The issue may be occurring due to the option 'Require login to view uploaded files' is enabled in the Privacy section of your account settings.

Please try disabling it so that the file upload links shall be working fine without logging into your JotForm account. 

Please get back to us if you need any further assistance. We will be happy to help.