RSS-Feed Widget blackout the page

[jhemelo]

I'm just a beginner with this yml file tweaks , so apologies if my inquiry is too basic .

What I am trying to achieve here is to setup a RSS-FEED reader with the widget provided in the dashy documentation to pull security advisories articles from this feed https://www.sophos.com/en-us/security-advisories/feed

I edited my Yml file just like this:

But when I save the yml file, and then I refresh dashy GUI in the Browser ( chrome) show up like this:

Once I remove that section that I created to the widget , the dashy page back to normal show the other itens sections.

Do I need to install anything or any other configuration in the dashy container to make this work?

UPDATE: tried few other widget , basic ones such as clock and all of them I get the same outcome , when I check GUI, the page shows empty. I am having the impression that I maybe did this section incorrect, can you tell me if the image with the yml file is incorrect?

Any help will be welcome :)