gnucash: missing Adwaita icon theme

[Sam Lee]

This is what gnucash prints to the terminal when I run it:

--8<---------------cut here---------------start------------->8---
(gnucash:818741): Gtk-WARNING **: 00:04:52.269: Could not load a pixbuf from 
/org/gtk/libgtk/theme/Adwaita/assets/check-symbolic.svg.
This may indicate that pixbuf loaders or the mime database could not be found.
Traceback (most recent call last):
  File 
"/gnu/store/fh11ychpkijbj5yc64admn0mpzv03cnv-gnucash-4.10/share/gnucash/python/init.py",
 line 2, in <module>
    from gnucash import *
ModuleNotFoundError: No module named 'gnucash'
Found Finance::Quote version 1.47.
--8<---------------cut here---------------end--------------->8---

Some icons are missing in the GUI. For example, the "Save" and "Close"
icons in the toolbar are missing. Does this mean that I will need to
manually install the "adwaita-icon-theme" package? If so, why isn't it a
dependency of the gnucash package?