Thanks for flagging this.
While checking your account, I noticed an error in your licenses which is now corrected.
Could you try to activate it again? Should be okay now.
(FYI, I am going to delete your screenshot for privacy reasons)
I see this is in maintenance mode. This normally means your site returns a 503 (maintenance mode) server response and that usually blocks the license activation.
When your site goes live and the maintenance mode is removed this should work as normal.
ps: don’t use the Lifetime (main) license key, that’s only for admin/renewal purposes. Always use the theme specific keys.