n8n-io/n8n · error · NodeOperationError

Error setting up Entra ID authentication

Error message

Error setting up Entra ID authentication: ${error.message}

What it means

setupOAuth2Authentication failed while creating the Entra ID (Azure AD) token provider for Azure OpenAI — e.g. fetching deployment details or building the N8nOAuth2TokenCredential-based bearer provider threw. The underlying error message is chained so the Entra/OAuth misconfiguration is visible.

Solutions

Check the chained message: deployment resolution and OAuth token issues are the usual causes
Verify the Azure OpenAI credential's OAuth data and deployment configuration, then retry

Defensive patterns

Strategy: try-catch

When it happens

Trigger: Thrown at packages/@n8n/nodes-langchain/nodes/llms/LmChatAzureOpenAi/credentials/oauth2.ts:40 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

Authentication and authorization failures — expired tokens, bad credentials, and missing scopes.

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/08b63561243c187e. Report an issue: GitHub.

Appendix: source

Thrown at packages/@n8n/nodes-langchain/nodes/llms/LmChatAzureOpenAi/credentials/oauth2.ts:40

		const entraTokenCredential = new N8nOAuth2TokenCredential(this.getNode(), credential);
		const deploymentDetails = await entraTokenCredential.getDeploymentDetails();

		// Use getBearerTokenProvider to create the function LangChain expects
		// Pass the required scope for Azure Cognitive Services
		const azureADTokenProvider = getBearerTokenProvider(entraTokenCredential, AZURE_OPENAI_SCOPE);

		this.logger.debug('Successfully created Azure AD Token Provider.');

		return {
			azureADTokenProvider,
			azureOpenAIApiInstanceName: deploymentDetails.resourceName,
			azureOpenAIApiVersion: deploymentDetails.apiVersion,
			azureOpenAIEndpoint: deploymentDetails.endpoint,
		};
	} catch (error) {
		this.logger.error(`Error setting up Entra ID authentication: ${error.message}`, error);

		throw new NodeOperationError(
			this.getNode(),
			`Error setting up Entra ID authentication: ${error.message}`,
			error,
		);
	}
}

View on GitHub (pinned to 5ac6606e81)