Filenames with ' are not processed correctly

[dunker86]

Sample filename: “The Manual - A Philosopher's Guide to Life.epub”

When uploading this file and selecting the “Kepubify” option, a download link is offered on a Kobo e-reader. However, after downloading the file, the file is shown with a question mark (?) in place of the previous simple apostrophe character (') and it cannot be opened. The book doesn’t show up inside the library either.

For the record, I don’t know if having the “Kepubify” option enabled affects this, I’m just describing the settings I used.