library · inferred from evidence
langchainjs
A JavaScript library mentioned as the source of a regression bug affecting n8n.
- n8n AI Agent node fails with "Cannot read properties of null (reading 'length')" after upgrade to 1.103.1
Yes, this was a regression. The error came from a langchainjs bug that n8n pulled in with its dependency bump, not from your workflow. It was fixed upstream in langchainjs v0.3.31 and n8n merged the dependency upgrade in PR #19299, with the