Issue with documentation instructions

[KeenanFernandes2000]

I am following the instructions on https://langchain-ai.github.io/langgraphjs/tutorials/langgraph-platform/local-server/ so that I can use the cloud version of the langgraph studio to visualize my graphs and debug them. However once I reach to the " Launch LangGraph Server " stage, it keeps throwing the following error

Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'length')
at getGraphSchema (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/graph/load.mjs:68:19)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/api/assistants.mjs:86:25
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async logger2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/logger/index.js:39:5)
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async cors2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/cors/index.js:74:5)
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/server.mjs:26:5
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/hono-base.js:195:25

not sure what else to change since I use the pre-defined graphs when setting up the project

I am using window 11, node js v20 and langgraph js

[AmoonPod]

I'm getting the same error.
I'm using windows 11, node js v22.12.0 and langgraph js v0.2.44.

[jacoblee93]

Checking this out now CC @dqbd!

[jacoblee93]

Still works for me on Mac, may be Windows specific?

[SunnySunnyOMG]

Saw the same issue
Windows 11, Node 20,

"@langchain/core": "0.3.37",
"@langchain/langgraph": "0.2.44",
"@langchain/langgraph-cli": "0.0.9",

[AmoonPod]

Hi @jacoblee93, I've tested this on macOS with the same configurations, including the same versions of Node.js, npm, and all relevant packages, and it works as expected. However, the issue persists on Windows.

It seems like this might be a Windows-specific problem.

[dqbd]

Hello! Looking into the issue!

[AndryHTC]

Hello! Looking into the issue!

Thanks mate :)

[dqbd]

Hello! Released @langchain/[email protected] with Windows fixes! LMK if the issue still persists!

[KeenanFernandes2000]

Yes, everything is running based on the documentation provided

Thank you @dqbd & @jacoblee93, y'all lifesavers.

[AmoonPod]

I confirm this is fixed with 0.0.10 cli version. Thank you!