HTML/CSS confused

I’m a newbie, I’m on my first assignment, and I don’t know what I’m doing wrong.

<h1>CatPhotoApp</h1>
<h2>CatPhotos</h2>

It says my code is wrong.
I googled it and from what I read it’s right.

Does anyone know what I’m doing wrong??

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 (').

Can you please post a link to the challenge you are working on. Thanks

I assume it is this challenge?

There needs to be a space between the two words.

Cat Photos