Hi there, welcome to the forum.
Maybe try building it yourself with a helper:
paru spotify
See also:
Edit:
Disregard. You’ll probably encounter the same problems in the latest AUR comment:
https://aur.archlinux.org/packages/spotify
and in-fact it was flagged out-of-date:
https://aur.archlinux.org/pkgbase/spotify/flag-comment
Maybe the reason could be that there is a new version upstream?
Checking into the source section of the PKGBUILD, I see that now it should point instead to:
https://repository-origin.spotify.com/pool/non-free/s/spotify-client/spotify-client_1.2.9.743.g85d9593d_amd64.deb
released yesterday.
But this sounds very very unlikely to me…