Cannot run the extension

[MandanaMoshref]

Hello,

I am interested in this extension because of the hierarchy functionality.
I decided to install it however the name "switzerland" seems does not work when i add it as the plugin name (eeror: cannot find the plugin).

So I added in fact those listed in the setup.py file:

dcat_json_interface structured_data hierarchy_form hierarchy_display ogdch ogdch_pkg ogdch_res ogdch_group ogdch_org ogdch_org_search ogdch_group_search dcat_ch_rdf_harvester (# ogdch_dcat --> because already installed dcat and it throughs error)

anyways still with this list in production.ini / plugin -> I receive an error saying:
pkg_dict['display_name'] = pkg_dict['title'] KeyError: 'title

Can someone help me how to solve it?

My use case is to have the hierarchy for the organization in a way that I can visualize the sub organisations and in fact the super organization / organization has directly no database related to but it should be used to first represent the hierarchy in the organisation page.
Also for search based on super organization / organization I would like to see the list of all datasets from all sub organisations.
Can someone help me on how to implement that? Does that work easier with ckanext-hierachy?

Best regards
Mani