If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
The widget you're wanting to add is a Blogger-specific widget and cannot be added to your Yola site.
You can still add a subscribe button if you wish though but it will not list the people who are following you. You can find this on your blog page, in the Blogging section on your Sidebar. You will see a "Blog RSS Widget".