Please Help with Voucher Press!

Hi, I have quite a few vouchers created. None of them require an email to download. I would like to have one set up where an email is required. When I set it up and tested it out – everything seems to be working fine yet it sends what I believe is a relative link.

“You have successfully registered to download this voucher, please download the voucher from here:

/?voucher=1b947162b03b7c4fa22ad65242b248e1&guid=b0e88b16b1154b6b5a49f5322ef28f3b”

Does anyone know where and how I change this – so my customers can see an actual live link to click on?

Thank you so much!