This has been known a few weeks, audacity needed a rebuild on libid3tag 0.16.2, but failed to build.
Options tried were using a fork ( so it can use system wxwidgets), but the fork has no stable releases and does not seem active (fork started for the telemetry issues in audacity 3.x.x, see https://forum.kaosx.us/d/2842-what-to-do-with-audacity), tried rebuilding current 3.0.2 and newer releases, all fail to build, so only option left was to go back to last version that actually builds with system wxwidgets, 2.4.1.
It will move shortly to all users, but until then you can get it with:
sudo pacman -U http://kaosx.tk/repo/build/audacity-1:2.4.1-1-x86_64.pkg.tar.zst