Caja does not start on GNOME Shell

[Norbert]

Steps to reproduce:
1. Install latest 18.10 iso
2. Install `caja`
3. Try to launch `caja` from terminal in GNOME sHell session

Expected behaviour:
* Caja started normally.

Actual results:
* Caja does not start, shows error message in the terminal:

$ caja

(caja:8695): dbind-WARNING **: 17:05:50.301: Couldn't register with accessibility bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Initializing caja-open-terminal extension

(caja:8695): GLib-GIO-CRITICAL **: 17:05:51.189: g_dbus_connection_call_internal: assertion 'object_path != NULL && g_variant_is_object_path (object_path)' failed

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: caja 1.20.2-5
ProcVersionSignature: Ubuntu 4.17.0-9.10-generic 4.17.17
Uname: Linux 4.17.0-9-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 7 17:06:27 2018
InstallationDate: Installed on 2018-09-06 (0 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180822)
SourcePackage: caja
UpgradeStatus: No upgrade log present (probably fresh install)

[Norbert (nrbrtx)]

Ubuntu 18.04 LTS is also affected.