I think I know what is happening here.....
As many people on here are aware, the Android OS (and its built-in browser) of the Connect unit is obsolete by modern standards. The default home page is Google search and I think it may be this web page which is generating the "unsupported" message. There are a couple of things you will need to do to get round this problem and it would be worth (on your home PC etc) going to
www.honda.co.uk/cars and navigate to Honda Owners > More From Honda > Honda Connect FAQs and at the bottom of the list of selected questions there is a link to download the whole set of FAQs.
Look at the section on internet browsing, especially the last item on page 9 and the first on page 10. There you will learn how to display the URL bar at the top of the browser page and also how to set the home page to something other than Google. Having got the URL bar displayed try navigating to something like
www.bbc.co.uk which should work. You can then set the home page to this or any other URL or to a blank page.
Hope this helps