The Gnome-shell-unite extension (aur package) doesn’t work since last update. I first though it is because they didn’t upgrade the extension. But on Github, they seems to be ready for Gnome 45. And Manjaro is under Gnome 44.5.
@linux-aarhus : I use the stable version, currently under gnome 44.5. I tried to uninstall and reinstall Unite (after upgrade to 44.5), with no effect.
You should still have gnome-shell-extension-unite 72-1 (last version to support GNOME 44) in your package cache. Install that and do not update it until GNOME 45 arrives in the stable branch.