From 5d6d704d2cc673e1666fb0598fe7abc6ee932e44 Mon Sep 17 00:00:00 2001
From: Ylian Saint-Hilaire <ysainthilaire@hotmail.com>
Date: Thu, 20 Jan 2022 17:56:20 -0800
Subject: [PATCH] Fix for server crash when adding device group notification,
 #3498

---
 meshuser.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meshuser.js b/meshuser.js
index d52a1b4a..e8682d4f 100644
--- a/meshuser.js
+++ b/meshuser.js
@@ -1592,7 +1592,9 @@ module.exports.CreateMeshUser = function (parent, db, ws, req, args, domain, use
                     if (err != null) { if (command.responseid != null) { try { ws.send(JSON.stringify({ action: 'changemeshnotify', responseid: command.responseid, result: err })); } catch (ex) { } } break; }
 
                     // Change the device group notification
+                    if (user.links == null) { user.links = {}; }
                     if (user.links[command.meshid]) {
+                        // The user has direct rights for this device group
                         if (command.notify == 0) {
                             delete user.links[command.meshid].notify;
                         } else {