Update index.html

public/index.html

@@ -15,6 +15,7 @@
 <button onclick="activateXR()">Start Hit to Place Demo</button>
 <script>
 async function activateXR() {
+  try {
     const canvas = document.createElement("canvas");
     document.body.appendChild(canvas);
     const gl = canvas.getContext("webgl", {xrCompatible: true});
@@ -102,6 +103,9 @@ async function activateXR() {
       }
     };
     session.requestAnimationFrame(onXRFrame);
+  } catch (error) {
+    console.error("Error in activateXR:", error);
+  }
 }
 </script>
 </body>