Learn CSS Flexbox by Building a Photo Gallery - Step 2

HTML-CSS
1

Tell us what’s happening:
Describe your issue in detail here.
I dont understand why it doesnt pass, thank you so much in advance!
Your code so far

<!-- file: index.html -->

<!-- User Editable Region -->

<!DOCTYPE html>
<html lang="en">
  <head>
<meta name="viewport", content="width=device-width", initial-scale="1.0">
<meta Charset="UTF-8">
  </head>
  <body>
  </body>
</html>

<!-- User Editable Region -->


/* file: styles.css */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Challenge: Learn CSS Flexbox by Building a Photo Gallery - Step 2

Link to the challenge:

2

It’s not obvious from the instructions, but you only need one set of quote marks here, at the beginning and end of the attribute value.