diff --git a/static/js/download.js b/static/js/download.js
index 555baa5..01e1a97 100644
--- a/static/js/download.js
+++ b/static/js/download.js
@@ -1,7 +1,9 @@
 let updateInterval;
 
 document.addEventListener("DOMContentLoaded", () => {
-    const table = document.getElementById("download_contents").getElementsByTagName("tbody")[0];
+    const downloadContents = document.getElementById("download_contents");
+    if (!downloadContents) { return; }
+    const table = downloadContents.getElementsByTagName("tbody")[0];
     if (table.children.length === 0) { return; }
 
     updateInterval = setInterval(() => {