Error generating content: The requested module '@langchain/core/messages' does not provide an export named 'convertToProviderContentBlock'

[kaan-trusapien]

When I try to ask anything, getting error
Error generating content: The requested module '@langchain/core/messages' does not provide an export named 'convertToProviderContentBlock'

[erenyenigul]

This occurs in demo version as well

[javierquin]

same problem!

[Prathamkogta]

same problem

[wangyuheng]

need upgrade langchain/core

yarn add @langchain/core

[xwine]

same error

[jasperhajonidesNA]

Same

[0x-Professor]

Still facing the same issue

[iqdoctor]

Summary

This error occurs when @langchain/openai expects a newer @langchain/core that exports convertToProviderContentBlock, but an older @langchain/core is actually being imported at runtime. In monorepos, this often happens because the umbrella langchain package installs its own nested copy of @langchain/openai and @langchain/core under node_modules/langchain/node_modules, bypassing the hoisted top-level versions.

SyntaxError: The requested module '@langchain/core/messages' does not provide an export named 'convertToProviderContentBlock'
    at ModuleJob._instantiate ...
    at async _initChatModelHelper (.../node_modules/langchain/dist/chat_models/universal.cjs:37:40)
    at async ConfigurableModel._model ...

Workarounds / Fixes
Pin compatible versions globally to guarantee compatibility of all libs

  "resolutions": {
    "@langchain/core": "0.3.68",
    "@langchain/openai": "0.5.11",
    "langchain": "0.3.27",
    "@langchain/langgraph": "0.2.73",
    "prosemirror-view": "1.37.2"
  }

in package.json

Subbug about prosemirror-view

Bug: BlockNote breaks with prosemirror-view@1.38+ (__serializeForClipboard removed)
Summary
When building the web app that uses @blocknote/core, the bundle fails because it (or a transitive package) imports __serializeForClipboard from prosemirror-view. Starting with prosemirror-view 1.38.0, that named export was removed and the clipboard logic was migrated to an instance method: view.serializeToClipboard(...). Older BlockNote builds still import the removed symbol → build/runtime error.

Summary
When building the web app that uses @blocknote/core, the bundle fails because it (or a transitive package) imports __serializeForClipboard from prosemirror-view. Starting with prosemirror-view 1.38.0, that named export was removed and the clipboard logic was migrated to an instance method: view.serializeToClipboard(...). Older BlockNote builds still import the removed symbol → build/runtime error.

Workarounds (confirmed)
A) Pin prosemirror-view to a pre-change version

// package.json (root)
{
  "resolutions": {
    "prosemirror-view": "1.37.2"
  }
}

also total solution for both cases

  "resolutions": {
    "@langchain/core": "0.3.68",
    "@langchain/openai": "0.5.11",
    "langchain": "0.3.27",
    "@langchain/langgraph": "0.2.73",
    "prosemirror-view": "1.37.2"
  }

When:

yarn cache clean
rm -rf node_modules apps/*/node_modules packages/*/node_modules yarn.lock
yarn install --frozen-lockfile --ignore-scripts
yarn why @langchain/core @langchain/openai langchain @langchain/langgraph prosemirror-view

[lineuman]

i get the same problem

[Ki-Seki]

me too

[akzalon]

How to fix this?