I have just purchased "rss importer" en "news" but I have an error when trying to add new feeds.
In studio, I have set "Content Module to populate with RSS feed" to "Feed"
Then when I click on "RSS feed list" I am redirected to the page /page/newsrss-manage . From there I click on "Add new" but I get the following error message : "Unknown control type Unknown control type".
Could you please help me ?