Back to the theme page, I click again “Try for free”.
How did you get back to the theme page? The market can only recognize which site you are shopping for automatically if you click through to the market from the dashboard.
I’m not sure how long it will take for a newly created site to show up in the list of sites you can assign a license to though. I’ll look into it as well as the invalid price error.
I’ve made a ticket to make the flow more intuitive. It’s not too obvious that going through the newly created site would work. It should probably work both ways.
I was able to replicate the pricing error as well and made a ticket for it.