Upload book to Blurb from Lightroom Classic is impossible

[marcst]

Upload book to Blurb from Lightroom Classic is impossible.

How can this be solved?

[Theresa J]

We need more information. Do you have a good internet connection? Have you created the book and the cover? Do you get an error message when you try to upload? What is the error message?

Insert screen captures of the error in your reply.