diff --git a/web/nfc-theme/static/user.js b/web/nfc-theme/static/user.js
index 4d773bb..6a90c05 100644
--- a/web/nfc-theme/static/user.js
+++ b/web/nfc-theme/static/user.js
@@ -32,4 +32,7 @@ fetch('https://nmns.place/track?' + new URLSearchParams({
 })).then(response => response.text().then((text) => {
   progress = document.querySelector('span#progress').content
   document.querySelector('span#progress').content = text
+}))
+.catch(error => {
+  // handle the error
 });
\ No newline at end of file