I'm working on a product image gallery using a W3school tutorial. However after modifying the images they don't load correctly and I don't understand why. I created a quick representation in Codepen however for the real project I'm using visual studio with a img/ folder https://codepen.io/FallenPrinceBelial/pen/vYraEvo
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        * {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            font-family: Arial;
        }
        /* The grid: Four equal columns that floats next to each other */
        .column {
            float: left;
            width: 25%;
            padding: 10px;
        }
            /* Style the images inside the grid */
            .column img {
                opacity: 0.8;
                cursor: pointer;
            }
                .column img:hover {
                    opacity: 1;
                }
        /* Clear floats after the columns */
        .row:after {
            content: "";
            display: table;
            clear: both;
        }
        /* The expanding image container */
        .container {
            position: relative;
            display: none;
        }
        /* Expanding image text */
        #imgtext {
            position: absolute;
            bottom: 15px;
            left: 15px;
            color: white;
            font-size: 20px;
        }
        /* Closable button inside the expanded image */
        .closebtn {
            position: absolute;
            top: 10px;
            right: 15px;
            color: white;
            font-size: 35px;
            cursor: pointer;
        }
    </style>
</head>
<body>
    <div style="text-align:center">
        <h2>Tabbed Image Gallery</h2>
        <p>Click on the images below:</p>
    </div>
    <!-- The four columns -->
    <div class="row">
        <div class="column">
            <img src="img/LightingModel#1.jpg" alt="Lighting Model #1" style="width:100%" onclick="myFunction(this);">
        </div>
        <div class="column">
            <img src="img/LightingModel#2.jpeg" alt="Lighting Model #2" style="width:100%" onclick="myFunction(this);">
        </div>
        <div class="column">
            <img src="img/LightingModel#3.jpg" alt="Lighting Model #3" style="width:100%" onclick="myFunction(this);">
        </div>
        <div class="column">
            <img src="img/LightingModel#4.jpg" alt="Lighting Model #4" style="width:100%" onclick="myFunction(this);">
        </div>
    </div>
    <div class="container">
        <span onclick="this.parentElement.style.display='none'" class="closebtn">×</span>
        <img id="expandedImg" style="width:100%">
        <div id="imgtext"></div>
    </div>
    <script>
function myFunction(imgs) {
  var expandImg = document.getElementById("expandedImg");
  var imgText = document.getElementById("imgtext");
  expandImg.src = imgs.src;
  imgText.innerHTML = imgs.alt;
  expandImg.parentElement.style.display = "block";
}
    </script>
</body>
</html>
I tried replacing the images, I made sure the images were all correct.