If you guys can make copy but cannot print, most probably it is driver issue. You need to check is it you choose the correct driver? if yes, maybe you guys need to reinstall again. Hope it can help!
You must scan the QR code, click continue to attach the screenshot (it is the only proof of payment) and you can complete the purchase.
If you guys can make copy but cannot print, most probably it is driver issue. You need to check is it you choose the correct driver? if yes, maybe you guys need to reinstall again. Hope it can help!