From a00ddc9da1d6fd65325cb3794fba21272c4ddca4 Mon Sep 17 00:00:00 2001
From: Ruben Thoms <ruben.thoms@ceetronsolutions.com>
Date: Thu, 13 Jun 2024 10:56:27 +0200
Subject: [PATCH] Added check for `null`

---
 frontend/src/framework/GuiMessageBroker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frontend/src/framework/GuiMessageBroker.ts b/frontend/src/framework/GuiMessageBroker.ts
index f43d76b36..4ecf0c309 100644
--- a/frontend/src/framework/GuiMessageBroker.ts
+++ b/frontend/src/framework/GuiMessageBroker.ts
@@ -131,7 +131,7 @@ export class GuiMessageBroker {
             // For now, persistent states are only stored in localStorage
             // However, in the future, we may want to store at least some of them in a database on the server
             const stateValue = this._storedValues.get(state);
-            if (stateValue === undefined) {
+            if (stateValue === undefined || stateValue === null) {
                 return;
             }
             localStorage.setItem(state, JSON.stringify(stateValue));