diff --git a/server/model/monitor.js b/server/model/monitor.js
index 1cb562412..81052777f 100644
--- a/server/model/monitor.js
+++ b/server/model/monitor.js
@@ -1068,7 +1068,13 @@ class Monitor extends BeanModel {
 
             for (let notification of notificationList) {
                 try {
-                    await Notification.send(JSON.parse(notification.config), msg, await monitor.toJSON(false), bean.toJSON());
+                    // Prevent if the msg is undefined, notifications such as Discord cannot send out.
+                    const heartbeatJSON = bean.toJSON();
+                    if (!heartbeatJSON["msg"]) {
+                        heartbeatJSON["msg"] = "";
+                    }
+
+                    await Notification.send(JSON.parse(notification.config), msg, await monitor.toJSON(false), heartbeatJSON);
                 } catch (e) {
                     log.error("monitor", "Cannot send notification to " + notification.name);
                     log.error("monitor", e);
diff --git a/server/notification-providers/discord.js b/server/notification-providers/discord.js
index 28ead7b7a..ac5c8ae84 100644
--- a/server/notification-providers/discord.js
+++ b/server/notification-providers/discord.js
@@ -64,7 +64,7 @@ class Discord extends NotificationProvider {
                             },
                             {
                                 name: "Error",
-                                value: heartbeatJSON["msg"],
+                                value: heartbeatJSON["msg"] == null ? "N/A" : heartbeatJSON["msg"],
                             },
                         ],
                     }],