The button says "Processing... Please wait a few seconds..." and never stops
Normally that message lasts a few seconds while the book is rebuilt, and Add to cart comes back. It can stick when your book is outside the printable range — under 20 pages or over 500 — so check for a yellow warning above the buttons and fix the page count first. If there is no warning and it has been more than a couple of minutes, reload the page: your book is not damaged, and it will open in its last good state.
Where to find it: Top right of the editor, where Add to cart normally sits.
Write to help@mysocialbook.com or through our contact form with the book's period and a screenshot.
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