diff --git a/auth/assets/templates/template-dev.html.tpl b/auth/assets/templates/template-dev.html.tpl
index 86e702e8e..10bd6fc45 100644
--- a/auth/assets/templates/template-dev.html.tpl
+++ b/auth/assets/templates/template-dev.html.tpl
@@ -7,7 +7,7 @@
 		<link href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css" rel="stylesheet">
 		<script type="application/javascript">
 			window.addEventListener('load', function() {
-				document.getElementByID('preview').src=location.hash.substring(1)
+				document.getElementById('preview').src=location.hash.substring(1)
 			})
 		</script>
 	</head>
@@ -39,6 +39,7 @@
 				<div class="col-9 m-0 p-0">
 					<iframe
 						name="preview"
+						id="preview"
 						class="w-100 border-0"
 						style="height: 100vh;"
 						src="about:blank"