Folders on Desktop are not openned

[Spam Riko]

Double clicking on any folder located on the Desktop or even right click and then Open, does nothing.

System and package info:
Description: Ubuntu 18.04.1 LTS
Release: 18.04

nautilus:
  Installed: 1:3.26.4-0~ubuntu18.04.1
  Candidate: 1:3.26.4-0~ubuntu18.04.1
  Version table:
 *** 1:3.26.4-0~ubuntu18.04.1 500
        500 http://il.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.26.3-0ubuntu4 500
        500 http://il.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

What you expected to happen:
nautilus executes and displays the folder being "double-clicked".

What happened instead:
Nothing happens.
I did some diagnostics, terminating 'nautilus-desktop' and ran it again using terminal, it logs out the following message:
'** (nautilus-desktop:17722): WARNING **: 14:50:00.201: Unable to create File Manager freedesktop proxy: Error calling StartServiceByName for org.freedesktop.FileManager1: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.freedesktop.FileManager1: No such file or directory
'

In addition, running 'nautilus' prior to running 'nautilus-desktop', then running 'nautilus-desktop', fixes the problem, and now I can open folders from desktop.
Terminating 'nautilus' only, I can still open folders from desktop, but only for few seconds where 'nautilus' completely terminates.

Additional info: $ ll /etc/dbus-1/system.d

total 168
drwxr-xr-x 2 root root 4096 Oct 12 13:43 ./
drwxr-xr-x 4 root root 4096 Jul 25 06:04 ../
-rw-r--r-- 1 root root 1144 Feb 2 2018 avahi-dbus.conf
-rw-r--r-- 1 root root 1456 Jun 22 12:27 bluetooth.conf
-rw-r--r-- 1 root root 752 Mar 7 2018 com.hp.hplip.conf
-rw-r--r-- 1 root root 1007 Apr 3 2018 com.redhat.NewPrinterNotification.conf
-rw-r--r-- 1 root root 1016 Apr 3 2018 com.redhat.PrinterDriversInstaller.conf
-rw-r--r-- 1 root root 733 Nov 4 2013 com.ubuntu.LanguageSelector.conf
-rw-r--r-- 1 root root 759 Feb 18 2014 com.ubuntu.ScreenResolution.Mechanism.conf
-rw-r--r-- 1 root root 662 May 2 16:58 com.ubuntu.SoftwareProperties.conf
-rw-r--r-- 1 root root 726 Nov 4 2015 com.ubuntu.SystemService.conf
-rw-r--r-- 1 root root 766 Apr 29 2015 com.ubuntu.USBCreator.conf
-rw-r--r-- 1 root root 929 Oct 11 2017 com.ubuntu.WhoopsiePreferences.conf
-rw-r--r-- 1 root root 652 Feb 16 2018 dnsmasq.conf
-rw-r--r-- 1 root root 3883 Jun 13 15:04 gdm.conf
-rw-r--r-- 1 root root 1016 Dec 2 2017 kerneloops.conf
-rw-r--r-- 1 root root 2073 Feb 1 2018 net.hadess.SensorProxy.conf
-rw-r--r-- 1 root root 465 Mar 26 2018 nm-dispatcher.conf
-rw-r--r-- 1 root root 562 Apr 8 2018 nm-pptp-service.conf
-rw-r--r-- 1 root root 434 Feb 11 2009 org.debian.apt.conf
-rw-r--r-- 1 root root 917 Dec 18 2017 org.freedesktop.Accounts.conf
-rw-r--r-- 1 root root 899 Apr 10 2018 org.freedesktop.bolt.conf
-rw-r--r-- 1 root root 1569 Jul 23 2017 org.freedesktop.ColorManager.conf
-rw-r--r-- 1 root root 1043 Mar 12 2018 org.freedesktop.fwupd.conf
-rw-r--r-- 1 root root 711 Jul 20 2017 org.freedesktop.GeoClue2.Agent.conf
-rw-r--r-- 1 root root 1231 Jul 20 2017 org.freedesktop.GeoClue2.conf
-rw-r--r-- 1 root root 9662 Apr 24 14:06 org.freedesktop.ModemManager1.conf
-rw-r--r-- 1 root root 10309 Mar 26 2018 org.freedesktop.NetworkManager.conf
-rw-r--r-- 1 root root 1331 Apr 24 17:13 org.freedesktop.PackageKit.conf
-rw-r--r-- 1 root root 632 Jul 13 14:42 org.freedesktop.PolicyKit1.conf
-rw-r--r-- 1 root root 1075 Feb 16 2018 org.freedesktop.RealtimeKit1.conf
-rw-r--r-- 1 root root 1118 Apr 20 2018 org.freedesktop.thermald.conf
-rw-r--r-- 1 root root 525 Jul 12 19:01 org.freedesktop.UDisks2.conf
-rw-r--r-- 1 root root 1555 Jan 30 2018 org.freedesktop.UPower.conf
-rw-r--r-- 1 root root 765 Apr 18 2018 org.mate.SettingsDaemon.DateTimeMechanism.conf
-rw-r--r-- 1 root root 545 Jun 6 17:23 org.opensuse.CupsPkHelper.Mechanism.conf
-rw-r--r-- 1 root root 1084 May 21 17:41 pulseaudio-system.conf
-rw-r--r-- 1 root root 1513 Feb 5 2018 wpa_supplicant.conf

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus 1:3.26.4-0~ubuntu18.04.1
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 20 14:54:36 2018
InstallationDate: Installed on 2018-09-20 (29 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=en_IL:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IL
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus:

[Spam Riko (spameriko)]

I've found remains of mate, removed it:
$ sudo apt remove -y ubuntu-mate-desktop mate-* ubuntu-mate-* \
       plymouth-theme-ubuntu-mate-* lightdm
$ sudo apt autoremove -y
$ sudo apt install --reinstall -y gdm3
$ sudo reboot

Now everything works just fine. Please, close this bug.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ovid (perseon)]

I confirm #2 is the solution