Add-on doesn't appear in Illustrator even when it says "Installed" on the page with all my add-ons

Hello,

I have published an add-on via producer portal successfully. I have published it as Private to test if it would work well and I if I can install/uninstall it. The add-on compatible with Adobe Illustrator version 20 and higher.

The add-on appeared in my add-ons here https://creative.adobe.com/addons/my_addons

If I click on "Install" button, the page redirects and says the add-on has been installed.

But if I open Creative Cloud application 3.9.1.335, there is nothing related the installed add-on. It has to show me a notification and a new record has to appear in activity stream section

As a result nothing appeared in Illustrator. I'm using the latest Adobe Illustrator 2017.0.1.

The same result if I remove the add-on. it just redirect a page and says it's been removed without any notification in Creative Cloud app.

Just to be sure Creative Cloud works well, I tried to install another add-on "QR Code Marker" I've found in the library.

It's been installed successfully!

What could it be? What could be wrong? Please, let me know if I need to provide more details.