I got 4 errors. It is difficult to solve those errors for me.
<!DOCTYPE>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>My Portfolio</title>
<head>
<header id="header">
<link rel="preconnect" href="https://fonts.gstatic.com">
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@600&display=swap" rel="stylesheet">
</header>
<script src="https://kit.fontawesome.com/dd8d422625.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="style.css">
<head>
<body>
<nav id="navbar">
<div class="topnav">
<div id="profile-link" class="profile-link">
<a href="https://www.facebook.com/smt.deepika" target="_blank" class="active"><i class="fab fa-facebook"></i></a>
<a href="https://www.freecodecamp.org/hemadeepikarani" target="_blank" class="active"><i class="fab fa-free-code-camp"></i></a>
</div>
<div id="myLinks">
<a href="#Projects">Projects</a>
<a href="#contact">Contact</a>
<a href="#about">About</a>
</div>
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</div>
<section id="welcome-section">
<div id="headings">
<h1> Web Designer </h1>
<p><strong> <h4>Hema Deepika Rani</h4></strong></p>
</div>
</section>
<section id="projects">
<h2 id="Projects">Projects</h2>
<div class="grid-container">
<div class="row">
<div id="Projects" class="project-tile">
<iframe height="265" style="width: 80%;" scrolling="no" title="vYxrNVB" src="https://codepen.io/niyasri/embed/preview/vYxrNVB?height=265&theme-id=light&default-tab=result" frameborder="no" loading="lazy" allowtransparency="true" allowfullscreen="true">
See the Pen <a href='https://codepen.io/niyasri/pen/vYxrNVB'>vYxrNVB</a> by hemadeepika
(<a href='https://codepen.io/niyasri'>@niyasri</a>) on <a href='https://codepen.io'>CodePen</a>.
</iframe>
</div>
<div class="project-tile">
<iframe height="265" style="width: 80%;" scrolling="no" title="jOBpbvV" src="https://codepen.io/niyasri/embed/preview/jOBpbvV?height=265&theme-id=light&default-tab=result" frameborder="no" loading="lazy" allowtransparency="true" allowfullscreen="true">
See the Pen <a href='https://codepen.io/niyasri/pen/jOBpbvV'>jOBpbvV</a> by hemadeepika
(<a href='https://codepen.io/niyasri'>@niyasri</a>) on <a href='https://codepen.io'>CodePen</a>.
</iframe>
</div>
</div>
<div class="row">
<div class="project-tile">
<iframe height="265" style="width: 80%;" scrolling="no" title="vYxzqLp" src="https://codepen.io/niyasri/embed/preview/vYxzqLp?height=265&theme-id=light&default-tab=result" frameborder="no" loading="lazy" allowtransparency="true" allowfullscreen="true">
See the Pen <a href='https://codepen.io/niyasri/pen/vYxzqLp'>vYxzqLp</a> by hemadeepika
(<a href='https://codepen.io/niyasri'>@niyasri</a>) on <a href='https://codepen.io'>CodePen</a>.
</iframe>
</div>
<div class="project-tile">
<iframe height="265" style="width: 80%;" scrolling="no" title="GRWGwLg" src="https://codepen.io/niyasri/embed/preview/GRWGwLg?height=265&theme-id=light&default-tab=result" frameborder="no" loading="lazy" allowtransparency="true" allowfullscreen="true">
See the Pen <a href='https://codepen.io/niyasri/pen/GRWGwLg'>GRWGwLg</a> by hemadeepika
(<a href='https://codepen.io/niyasri'>@niyasri</a>) on <a href='https://codepen.io'>CodePen</a>.
</iframe>
</div>
</div>
</div>
</section>
<script>
</script>
</body>
</html>