'charmap' codec can't encode. Audio generation failed

[mysticviper-x]

I just want to test the voice, and i get the following error:
Preview error: Voice preview error: 'charmap' codec can't encode characters in position 19-28: character maps to <undefined>

Running a test conversion with a ebook's first chapter gets the following error:

Downloading 'config.json' from Hugging Face (hexgrad/Kokoro-82M). Please wait...
Error occurred: 'charmap' codec can't encode characters in position 19-28: character maps to <undefined>
Audio generation failed.

[jborza]

@mysticviper-x which voice did you try to test?

[jborza]

Strange, I just got the same error when attempting to convert a mobi book. Abogen doesn't support mobi books, only pdf and epub and text. it thinks mobi is plain text and then fails. I suppose we should warn the user earlier than showing a mysterious error during conversion.