diff --git a/openvidu-server/src/main/resources/templates/error/404.html b/openvidu-server/src/main/resources/templates/error/404.html
new file mode 100644
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+++ b/openvidu-server/src/main/resources/templates/error/404.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+<body>
+	<h1>
+		ERROR: unknown URL
+		<code>
+			<span id="url-title"></span>
+		</code>
+	</h1>
+	<h2>
+		OpenVidu Server does not have path
+		<code>
+			<span id="path"></span>
+		</code>
+		mapped
+	</h2>
+	<p>
+		If you are seeing this message as a result of COMPOSED recording, the
+		problem is most likely an issue with the recording URL.<br>
+		Current recording URL is <strong id="url"></strong><br> The
+		recording service cannot access the recording layout through this URL.<br>
+		Use OpenVidu configuration property <strong><code>OPENVIDU_RECORDING_COMPOSED_URL</code></strong>
+		to provide a valid URL for the recording service to connect to.
+	</p>
+</body>
+
+<script>
+	window.onload = function() {
+		var url = window.location.origin + window.location.pathname;
+		document.getElementById("url-title").innerHTML = url;
+		document.getElementById("url").innerHTML = url;
+		document.getElementById("path").innerHTML = window.location.pathname;
+	}
+</script>
+
+<style>
+h1 {
+	font-size: 32px;
+}
+
+h2 {
+	font-size: 30px;
+}
+
+p {
+	font-size: 22px;
+}
+</style>
+
+</html>
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