diff --git a/js/utils.js b/js/utils.js
index 5066454b..ca9c1ca6 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -37,6 +37,9 @@ export const getTimeObj = time => {
 };
 
 export const getTimeStr = (time, truncate = true) => {
+  if (time == null) {
+    return "";
+  }
   const {
     minutesFirstDigit,
     minutesSecondDigit,