Extension "apps-menu" depends on port "x11/gnome-menus" which is not required.
I was just bitten by this. gnome-shell-extensions-3.18.4 has a hidden dependency on gnome-menus-3.13.3_1 through at least one shell extension. The one that triggered a missing TypeLib stacktrace for me was "Auto move windows". Pressing the gear button tries to load a menu which fails. Installing gnome-menus makes the error go away.
gnome-shell-extension requires gnome-menus package to be installed for
"Applications menu" to work.
FreeBSD 11.1-RELEASE #0 r321309: Fri Jul 21 02:08:28 UTC 2017 email@example.com:/usr/obj/usr/src/sys/GENERIC
This issue was hard to debug.
Finally found error in ~/.cache/gdm/session.log
(gnome-shell:4332): Gjs-WARNING **: JS ERROR: Exception in callback for signal: extension-found: Error: Requiring GMenu, version none: Typelib file for name
space 'GMenu' (any version) not found
Over to maintainer