G4SiPM Visualization GUI window

Hi,

I am currently new to Geant4 and Linux. I am currently trying to recreate a sample simulation of G4Sipm (external software package) after having installed Geant4 (version geant4.10.06.p02). It does run the command however no GUI window for graphical representation of the simulation is shown as suggested by this documentation https://g4sipm.readthedocs.io/en/latest/sample.html instead it gives me this

G4SiPM SampleSim Copyright © 2012 Tim Tim Niggemann, III Phys. Inst. A, RWTH Aachen University et. al.
This program comes with ABSOLUTELY NO WARRANTY; for details type show w'. This is free software, and you are welcome to redistribute it under certain conditions; type show c’ for details.


Geant4 version Name: geant4-10-06-patch-02 (29-May-2020)
Copyright : Geant4 Collaboration
References : NIM A 506 (2003), 250-303
: IEEE-TNS 53 (2006), 270-278
: NIM A 835 (2016), 186-225
WWW : http://geant4.org/


G4SipmUiMessenger::initRandomEngine(): CLHEP::MTwistEngine with seed 1596551731446814

Birks coefficients used in run time

Any help or advice is greatly appreciated (I tried both enabling both open GL and QT options for the software package as I installed them in Geant4 but to no avail).