We are sorry to hear that. There are a couple of scenarios that could have triggered the error message.
The first possible scenario is that there was a mistype in one of the email addresses that you entered or you forgot to put commas between multiple emails to separate them.
To eliminate confusion over what occurred, we recommend that you go back and enter each email address one at a time, clicking ‘send’ after each one rather than uploading them all at once.
If you are still having problems using the email referrals we recommend using your unique referral link or sharing the referral through Facebook, Twitter, or Messenger to receive credit. Please contact firstname.lastname@example.org if you need further assistance.