I'm getting the following error messages when running wallch:
ralmond@cherry:~$ wallch
(process:55334): Gtk-CRITICAL **: 13:53:20.890:
IA__gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
(process:55334): GLib-GObject-WARNING **: 13:53:20.890: invalid (NULL)
pointer
I will make a couple notes here:
(1) You're running Pop OS which DOES have a different DE than wallch was
developed for.
(2) wallch appears to run fine in the current Ubuntu. Which suggests
that the issue is in whichever DE Pop OS uses. And is why it hasn't
been removed yet. (I tested