Error when trying to install local package with pkcon

[koenigs]

I'm a beginner with Linux so please understand my skills are quite limited for the moment.

I wish to install Open Store so I installed PackageKit

Code:

$ sudo apt install packagekit

Then downloaded the armhf package from this page: https://open-store.io/app/openstore.openstore-team and ran

Code:

$ pkcon install-local --allow-untrusted openstore.openstore-team_2.95_armhf.click

However I'm getting the following error

Installing files              [=========================]         
Testing changes               [=========================]         
Finished                      [=========================]         
Fatal error: Could not find package(s)

Same issue if I'm trying to install another application like OSM Scout Server

What am I missing? 
Thanks for your answers