Epiphany 3.30: GNOME extensions site cannot detect a running copy of GNOME

Just updated to GNOME 3.30 on Arch, two different machines. When I use Epiphany and visit https://extensions.gnome.org/ I get that "We cannot detect a running copy of GNOME on this system, so some parts of the interface may be disabled." Not sure whether this is related to how Arch bundled GNOME 3.30! Screenshot_from_2018-09-19_13-17-47