root-nix [1] filed a deletion request for photoprint [2]: The software is no longer maintained. https://github.com/blackfiveimaging/photoprint/issues/7

My apologies, but I'm no longer developing PhotoPrint and related software. There have been changes to GutenPrint's API, and PhotoPrint will need updating to work with it.

[1] https://aur.archlinux.org/account/root-nix/ [2] https://aur.archlinux.org/pkgbase/photoprint/