Strange, I created the link right before creating the giveaway. Let me see if I can find another key. If I can't, would you be okay with canceling the giveaway?

Thanks for your patience.

I got another key. I updated the Giveaway's Won page.

I've contacted Humble Support. They recommended to verify you're logged into your account. They said they've seen people think gift links were bad, but they were just weren't logged in.

If this was the issue and you have an extra key, do with it what you want.