Hey! Welcome to the freeCodeCamp’s community forums. It would be much easier for others to help you if you add a brief description of the issues you’re facing in the post.
As for this particular problem, it looks like you have your start and end tags mixed up here
As a refresher, any HTML element should be in the form of
//start end
<article> </article>
you can have multiple element nested inside of a particular element.
//start
<article>
<p>this is a paragraph </p>
<button>hello<button>
//end
</article>
however, what you cannot do is start an element inside of a parent element and end it outside like this.
<article>
<p>
</article>
</p>
this is wrong and will cause expected behavior.
Hope this helps!