pkcon Fatal ERROR: MIME type not supported. when installing clicks in unity8 on a laptop

[Victor gonzalez]

A week ago I had no problem to install clicks(filemanager,music,terminal) but this week I came across with this pkcon error. Could it be caused by a packagekit update?

Enviroment: Desktop running unity8 on 16.10
            HW: intel graphics+intel processor

Preconditions: download some clicks of core/non core apps to install

Steps to reproduce:

1º Open terminal and run $ pkon install-local --allow-untrusted /path

Current result: pkcon command returns the error given at the bottom

Expected result: pkcon command should run with out any issue and clicks should be installed

Reproducibility 100%

-------------
output

11:59:57 PackageKit Verbose debugging enabled (on console 1)
11:59:57 PackageKit filter=(null), filters=0
11:59:57 PackageKit adding state 0x562f87db10d0
11:59:57 PackageKit doing install files
11:59:57 PackageKit role now install-files
Installing files [=========================] :59:57 PackageKit using frontend diaFinished [=========================] :59:57 PackageKit remove state 0x562Fatal error: MIME type 'application/x-click' not supported /home/users/Downloads/com.ubuntu.calendar_0.4.757_all.click

[Michał Sawicz (saviq)]

I'm afraid support for clicks was dropped in Y, we're working on replacing them with snaps in this release.

The problem is that packagekit 1.0 doesn't allow plugins any more, so the plugin was dropped in yakkety.

See https://launchpad.net/ubuntu/+source/click/0.4.44+16.10.20160809.1-0ubuntu1 for the relevant changelog entry.