Purchase code is invalid

I purchased a theme from themeforest and i installed it in my wordpress panel. Now i want to register my theme but i got Your Purchase Code is invalid. I’am using the purchase code in license text file that they give me. This is the beginning of my license text file:

LICENSE CERTIFICATE : Envato Market Item

This document certifies the purchase of:
ONE REGULAR LICENSE
as defined in the standard terms and conditions on Envato Market.

Licensor’s Author Username:
shinetheme

Licensee:
Sina ZandKarimi

Item Title:
Travel Booking WordPress Theme

Item URL:

Item ID:
10822683

Item Purchase Code:
9f63c98f----********

Purchase Date:
2019-12-07 17:23:46 UTC

Hi

Please note that you will be able to use the purchase code only for one end product mean only one time and only for a single url.
you can check this article:

Thanks