Thanks for writing in! Please install Pro theme in your WP installation. Once it is activated in Appearance > Themes, make sure that you have validated Pro theme in Pro > Validation. Once you have validated the theme, you should be able to install all the bundled plugins in Pro > Validation > Extensions.
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 > Overview again, and insert the license code.
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