An unexpected error occured

[dlowenth]

Describe the bug

When trying to open an older project (before the Claude update to Bolt.new) in Bolt.new directly or after opening it in Stackblitz I get this error and no chat box to be able to make changes.

TypeError: Cannot read properties of undefined (reading 'addChild')
at OrderedObjParser.addChild (https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:3475)
at OrderedObjParser.parseXml (https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:3288)
at XMLParser.parse (https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:7347)
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:9203
at Object.useMemo (https://bolt.new/assets/index-D-jtgaX5.js:22:24686)
at u.useMemo (https://bolt.new/assets/jsx-runtime-Dh9-PW9H.js:9:6333)
at useQuickActions (https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:8961)
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:18541
at Nh (https://bolt.new/assets/index-D-jtgaX5.js:22:17881)
at cj (https://bolt.new/assets/index-D-jtgaX5.js:24:3293)
at bj (https://bolt.new/assets/index-D-jtgaX5.js:24:2472)
at $i (https://bolt.new/assets/index-D-jtgaX5.js:24:2003)
at Vk (https://bolt.new/assets/index-D-jtgaX5.js:24:48181)
at Uk (https://bolt.new/assets/index-D-jtgaX5.js:24:40552)
at Tk (https://bolt.new/assets/index-D-jtgaX5.js:24:40458)
at Ik (https://bolt.new/assets/index-D-jtgaX5.js:24:40301)
at Nk (https://bolt.new/assets/index-D-jtgaX5.js:24:36551)
at Ek (https://bolt.new/assets/index-D-jtgaX5.js:24:37397)
at jg (https://bolt.new/assets/index-D-jtgaX5.js:22:3534)
at https://bolt.new/assets/index-D-jtgaX5.js:24:34865
Component stack:
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:51:18130
at div
at div
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:65:7051
at section
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:65:11216
at ClientOnly (https://bolt.new/assets/client-only-BMWoaIZM.js:1:820)
at div
at div
at div
at div
at ErrorBoundary (https://bolt.new/assets/ErrorBoundary-i70y5KMp.js:1:1456)
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:181:45850
at https://bolt.new/assets/Chat.client-CD4GPOM3.js:260:4136
at ProjectImport (https://bolt.new/assets/Chat.client-CD4GPOM3.js:260:2095)
at ClientOnly (https://bolt.new/assets/client-only-BMWoaIZM.js:1:820)
at div
at GithubIntegration (https://bolt.new/assets/github-BW4eZRP0.js:1:6528)
at IndexLayout (https://bolt.new/assets/IndexLayout-BBb53_YT.js:1:2404)
at Index (https://bolt.new/assets/_chat.~._slug-Cn1wqGAi.js:1:3466)
at RenderedRoute (https://bolt.new/assets/index-D-jtgaX5.js:43:3989)
at Outlet (https://bolt.new/assets/index-D-jtgaX5.js:43:8112)
at ChatLayout (https://bolt.new/assets/_chat-B0Z1oqh5.js:424:15540)
at RenderedRoute (https://bolt.new/assets/index-D-jtgaX5.js:43:3989)
at Outlet (https://bolt.new/assets/index-D-jtgaX5.js:43:8112)
at ErrorBoundary (https://bolt.new/assets/ErrorBoundary-i70y5KMp.js:1:1456)
at App (https://bolt.new/assets/root-DeJVeHJ6.js:16:1369)
at SentryRoot (https://bolt.new/assets/performance-C2nDNo6L.js:11:28928)
at ClientOnly (https://bolt.new/assets/client-only-BMWoaIZM.js:1:820)
at Layout (https://bolt.new/assets/root-DeJVeHJ6.js:16:25)
at RenderedRoute (https://bolt.new/assets/index-D-jtgaX5.js:43:3989)
at RenderErrorBoundary (https://bolt.new/assets/index-D-jtgaX5.js:43:3229)
at DataRoutes (https://bolt.new/assets/index-D-jtgaX5.js:52:6471)
at Router (https://bolt.new/assets/index-D-jtgaX5.js:43:8164)
at RouterProvider (https://bolt.new/assets/index-D-jtgaX5.js:52:3665)
at RemixErrorBoundary (https://bolt.new/assets/components-mGgzhdsP.js:89:84)
at RemixBrowser (https://bolt.new/assets/entry.client-D6x4suN-.js:19:1852)

Link to the blitz that caused the error

https://stackblitz.com/edit/sb1-aj8nnc?file=index.html

Steps to reproduce

Go to Stackblitz.com
Log in with the same credentials you use for Bolt
Go to Collections
Click Bolt collection
Select the project you want to open there
Click the Open in Bolt button at the top of the Stackblitz window

Expected behavior

Project opens normally in bolt.new

Parity with Local

• I have run the project in my local machine and I could not reproduce the issue.

Screenshots

Platform

Browser name  = Chrome
Full version  = 142.0.0.0
Major version = 142
navigator.appName = Netscape
navigator.userAgent = Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 Edg/142.0.0.0
performance.memory = {
  "totalJSHeapSize": 78515300,
  "usedJSHeapSize": 76989076,
  "jsHeapSizeLimit": 4294705152
}
Hash = cf284e50

Additional context

No response