When this extension is switched on the display crashes and logs out.

When I turn this extension on, some seconds later the window manager, gnome-shell crashes, disappears and when I click in a window (which is without frame - due to the crash) the system throws me to the login screen (gdm). It repeats until I remove gnome-shell-extension-multi-monitors package or I turn it off, which is not so easy due to the crash.

Description: Ubuntu 18.04 LTS
Release: 18.04

gnome-shell-extension-multi-monitors:
  Telepítve: (nincs)
  Jelölt: 0.00~git20171014.1.df5d6e4-1
  Verziótáblázat:
     0.00~git20171014.1.df5d6e4-1 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu bionic/universe i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell-extension-multi-monitors (not installed)
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue May 29 19:49:25 2018
InstallationDate: Installed on 2017-10-20 (221 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=hu_HU.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell-extension-multi-monitors
UpgradeStatus: Upgraded to bionic on 2018-04-15 (44 days ago)