To have a theme show, you must a least have one theme installed. Did you delete WP classic and default themes ? If not, login to your admin, go to appearance and select one of these themes. How are you accessing the admin pages ?
The problem is: I don’t know how to access the admin pages! I started the blog with the default theme and added some content. Then I tried the Lunated theme and did some more editing. No problem while I was still logged in as admin.
Later when I started the blog again (thethunderbirds.nl) it showed up alright in the browser. However, I couldn’t find a login button or anything like that and I had no idea how to log in as admin. So I posted here.
Then I followed esmi’s suggestion, but now I don’t see anything at all, just a white page…
I am no acquainted with Lunated theme, but it probable does not have a Login link. Which is fine as long as you know how to access your login page. 99% sure you can put your Lunated theme back in themes.