The upload directory is not writable: uploads won't work in your form.
Use your FTP software to set the permission to 755 on the directory cfgen-form-3/upload to solve this problem.
Set the permission to 777 if it does not work otherwise. If your website is installed on a Windows based server, you must make the directory writable.
If there is no directory upload inside the directory cfgen-form-3, use your FTP software to create it and set it with the permissions mentionned above (755 or 777).