It would be better if you shared your codepen link so we can read the full error message.
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.
Sorry about that, please see the below link for my code. I’m trying to match the viewport size with the height. Step 2 for the portfolio section layout test
Just note that it may change your layout a bit as element sizes are calculated differently. But it is usually how you want it anyway as it’s easier to reason about.