MarsSeed [1] filed a deletion request for calibre-unicode-path [2]: Unmaintained old version from 1 year ago of Arch/extra/calibre.
In case of bugs, please submit an issue (and a patch if you have created such) to upstream and/or to Arch GitLab. Don't create duplicate packages on AUR to fix bugs. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/calibre-unicode-path/