SharePoint RSS Feed in Microsoft Teams

Hi 

I'd like to add a RSS feed of a SharePoint Online Site to a Teams Channel.

When I Copy&Paste the URL: 

https://mySite.sharepoint.com/sites/OlisITBlog/_layouts/15/listfeed.aspx?List=xxxx%2Dxxxx%2Dxxxx%2Dxxxx%2Dxxxxx&View=xxxx%2xxxx%2Dxxxx%2Dxxxx%2Dxxxxxx

or 

feeds://mySite.sharepoint.com/sites/OlisITBlog/_layouts/15/listfeed.aspx?List=xxxx-xxx-xx-xxxx-xxxx&View=xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

I get: Enter a valid RSS feed address.

Any suggestions?