Thanks for writing in! I can see that you only have 6 licenses in your APEX account. Maybe you have another username which uses the other two licenses. Could you please post your missing license codes in the secure note in your next reply so that we can look it up.
On the other hand, to validate X properly, please do the following:
1] Please login to your account and assign the license (https://theme.co/apex/licenses). You need to assign the license to your site using this url: https://www.example.com/. You have to make sure that url you just assign is the same as the one you have in your settings, Settings > General > Site Address
2] Go back to X > Validation again, and insert the license again.
And please review the changes that we made on how you are going to validated your X theme because we made a big change in the process. Please check it out here: https://theme.co/apex/forum/t/setup-product-validation/55
Hope this helps.