diff --git a/tools/server/public/index.html.gz b/tools/server/public/index.html.gz
index fad36ed339..0e3e1f9834 100644
Binary files a/tools/server/public/index.html.gz and b/tools/server/public/index.html.gz differ
diff --git a/tools/server/webui/src/utils/app.context.tsx b/tools/server/webui/src/utils/app.context.tsx
index 0b95e88f89..1860ecc721 100644
--- a/tools/server/webui/src/utils/app.context.tsx
+++ b/tools/server/webui/src/utils/app.context.tsx
@@ -255,7 +255,7 @@ export const AppContextProvider = ({
         if (chunk.error) {
           throw new Error(chunk.error?.message || 'Unknown error');
         }
-        const addedContent = chunk.choices[0].delta.content;
+        const addedContent = chunk.choices[0]?.delta.content;
         const lastContent = pendingMsg.content || '';
         if (addedContent) {
           pendingMsg = {