Please, try to fix the functionality on Arabic Wikipedia. It's still not working.
Topic on Talk:Reading/Web/PDF Functionality/Flow
At all, you mean? What happens when you try to generate a PDF?
At all! When you click on create a book, then start, the template is not loaded on the page. It's weird because on Arabic Wikisource at least the template is loaded. So I assume, it's not a right to left issue.
Now it's loading. The remaining problem, is that we can't download the PDF of the book. But I think it's general issue.
Yes, that's not just Arabic Wikipedia, unfortunately. This is still in the works.