Which version of Lightroom do you have?
What is the error that you get while uploading book on blurb?
If possible, share a screenshot of the error message.
I cannot upload my book to blurb. Through the book module to blurb I get a variety of messages. "error uploading books cover." or "Error uploading books pages" or "error occurred while saving"
When I do PDF is uploads to my computer, but when trying to upload to Blurb I get "Preflight has deleted fatal problems with your PDF..."
I have tried maybe 20 times. Shut down LR, computer, internet, etc and started over.
I have spen 2 full days on the upload and no results.
I just updated to LR 6.8.
Have a book ready to go to Blurb and get "LR - An Error occurred while creating the book" This happens with the progress bar about a quarter through.
So I figured maybe memory/disk space problem. Backed up LR library, cleared caches, emptied recycle bin, updated LR to 6.8 (from 6.6).
So I figured I'd try to just to a print to PDF... I get a similar issue at the same point in progress "LR - An error occurred while saving the book".
Early on in the PDF saving process, the "[filename] cover.pdf" file does get created. it is still some processing time later, where I suspect its processing the remainder of the book that this error happens.
Somewhat urgent concern given xmas holiday printing / delivery deadlines.... please help!