NoobAlice [1] filed a deletion request for xfwm4-theme-freshdark [2]:

2020-10-28 00:20 Maintainer planned to look for another source, as deviantart no longer works. Package can't be made. No updates since that time. It has now been two months.

[1] https://aur.archlinux.org/account/NoobAlice/ [2] https://aur.archlinux.org/pkgbase/xfwm4-theme-freshdark/