Nautilus not opening up, showing GLib error

When I launch nautilus from terminal the following error is printed and nautilus doesn't open up.

(nautilus:25179): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed

(nautilus:25179): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
Could not register the application: Timeout was reached

(nautilus:25179): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed

(nautilus:25179): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(nautilus:25179): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

What could be the problem??

This answer by cortopy in ask.fedoraproject.org, worked for me.

I've been experiencing a similar problem today, only I couldn't open nautilus at all. So I'm wondering if this is due to some recent update clash.

This isn't a likely solution, but at least it allows me to carry on as normal.

First thing to try is sudo nautilus in a terminal. If it works, then it may mean that there is something wrong with active nautilus processess for your current user.

To be able to restart nautilus properly, do the following:

1. See what nautilus processes are running :

   ps aux | grep nautilus

2. Kill all nautilus processes you see :
   

   sudo kill PIDNUMBER

3. Restart nautilus :

   nautilus -q

Please type in Terminal:

sudo killall nautilus && (nautilus &)

Done.
This has reported here: Nautilus does not start