Nautilus won't launch on Ubuntu Gnome 16.04

I know there are other threads about this. I tried them but the offered solutions did not work and I'm not allowed to comment on the thread to ask for clarification, yet.

The only thing I've changed recently is the settings on my Numix icon theme (from default to green folders). This is the response I get when attempting to launch Nautilus from terminal:

************:~$ nautilus

(nautilus:23691): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->coections != NULL' failed

(nautilus:23691): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->coections != NULL' failed Could not register the application: Timeout was reached

(nautilus:23691): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed

(nautilus:23691): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(nautilus:23691): GLib-GObject-CRITICAL **: g_signal_coect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

Any help will be greatly appreciated.