How to solve it.
ERROR: KFX conversion failed: <p><b>Cannot convert Vademécum Veterinario: XIV Edición (Spanish Edition)</b><br><br>Exception('This book has a layout that is incompatible with calibre conversion. For best results use either the From KFX user interface plugin or the KFX Input plugin CLI for conversion. See the KFX Input plugin documentation for more information.')</p>