Wordpress does not recognize my license key

I downloaded X three days ago and for some reason WordPress does not recognize my validation key. I’m wondering if I registered my license with apex out of order or something, and I’m using a child theme if that helps at all.

Hi There,

Please refer to this article to learn how to validate your product.

You need first to register your URL at your Apex Licenses page.

https://theme.co/apex/licenses

Hope it helps!