Any advice on why I continue to get this error: "Your image should have a src attribute that points to the kitten image"?

You need to delete this url from here

and instead use this url

<img src="correct url goes here" alt="some text">

Make sense?

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (').