**List of steps to reproduce** (step by step, including full links if applicable):
* from https://la.wikisource.org/wiki/Ad_Alpēs
* Follow link to any WSExport
**What happens?**:
* Error returned: "Download failed. The book 'Ad_Alp%C4%93s' could not be found. " (See https://ws-export.wmcloud.org/tool/book.php?lang=la&format=epub&page=Ad_Alp%25C4%2593s )
**What should have happened instead?**:
* An Ebook (epub) should have been generated
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc**:
Other books export fine. It appears that the presence of a macron in the URL causes this.
Manually correcting the export field in the export tool also works, so the error could be in the LA / IT wiki tool [[ https://la.wikisource.org/wiki/Formula:WSExport | WSExport ]] used for link generation.