The Headline Block might have been corrupted as you were saving. Maybe your internet connect got lost exactly upon saving, or your server had an issue. There are many other server/client side incidents that may cause this. Recreating the Block should resolve the issue.
With that said, I recreated the Headline Block and the issue was resolved.
I also simply place the 2 Headline Blocks within a Container Block to put them in a new line.
With regards to the link, you can add a link to a dynamic Headline Block as such: https://share.getcloudapp.com/nOuXRjz2
For the author avatar, you’ll need to use a GB Image Block with settings like this: https://share.getcloudapp.com/xQuwqrd1
Hope this clarifies!