From 5dfa47ab6c4dccfd3f25b2204d58352afea700d9 Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Tue, 2 Apr 2024 15:54:34 +0100
Subject: [PATCH] Guard refresh of unknown subflow

---
 .../@node-red/editor-client/src/js/ui/tab-help.js           | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/tab-help.js b/packages/node_modules/@node-red/editor-client/src/js/ui/tab-help.js
index bf66611b1..8bfc5526e 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/tab-help.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/tab-help.js
@@ -158,8 +158,10 @@ RED.sidebar.help = (function() {
 
     function refreshSubflow(sf) {
         var item = treeList.treeList('get',"node-type:subflow:"+sf.id);
-        item.subflowLabel = sf._def.label().toLowerCase();
-        item.treeList.replaceElement(getNodeLabel({_def:sf._def,type:sf._def.label()}));
+        if (item) {
+            item.subflowLabel = sf._def.label().toLowerCase();
+            item.treeList.replaceElement(getNodeLabel({_def:sf._def,type:sf._def.label()}));
+        }
     }
 
     function hideTOC() {