(New) Responsive Web Design [step-4]

Tell us what’s happening:
The tutorial tells me:

Test
Sorry, your code does not pass. Don’t give up.

Hint
Your link element should be a self-closing element.

I know what it means but cant find the problem in my code.

  **Your code so far**
<!DOCTYPE html>
<html>
<head>
  <title>Registration Form</title>
  <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36 OPR/87.0.4390.56

Challenge: Step 4

Link to the challenge:

self closing tag <link />