Hi There,
Please follow these steps:
1] Please login to your account and revoke the license. https://community.theme.co/my-account/
2] After you have revoke the license, you need to re assign the license again to your site using this url: https://www.your-domain.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
3] Go back to X Addons > Home again, and insert the license again.
Hope that helps
Joao