From ee6d941014fa84fe081494797eb7753e21959b9c Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Sat, 11 Apr 2026 04:15:52 +0200
Subject: [PATCH] Throw error if activeProjectScene is undefined

---
 src/app/App.tsx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/app/App.tsx b/src/app/App.tsx
index ad7e6465..60a662f5 100644
--- a/src/app/App.tsx
+++ b/src/app/App.tsx
@@ -1104,6 +1104,13 @@ export function App({ store, initialStatusMessage }: AppProps) {
   const sceneList = Object.values(editorState.projectDocument.scenes);
   const activeProjectScene =
     editorState.projectDocument.scenes[editorState.activeSceneId];
+
+  if (activeProjectScene === undefined) {
+    throw new Error(
+      `Active scene ${editorState.activeSceneId} does not exist in the project document.`
+    );
+  }
+
   const brushList = Object.values(editorState.document.brushes);
   const layoutMode = editorState.viewportLayoutMode;
   const activePanelId = editorState.activeViewportPanelId;