Why are my Google credentials failing to load data in an n8n node?

Below is a list of troubleshooting steps you can follow to diagnose and resolve the error:

1. Verify the Credential Details

Even though the credentials look correct in the UI, double-check that all required fields (e.g. API key, secret, or other parameters) have been entered exactly as expected for that service. Sometimes even a small typo or missing parameter will prevent the API from returning the list data.

2. Test the Credential Connection

Many nodes offer the option to test the credential connection. Use that test button if available. A failing test indicates that the node’s request to the external service isn’t succeeding, which confirms the need to double-check the API endpoint, keys, and any other configuration details.

3. Check Network Connectivity

Since you’re running n8n via Docker, ensure that the container has network access to the external API. It’s possible that network issues (or firewall rules) are preventing the container from reaching the service.

4. Review the Node Settings

Ensure that the node using the credential is correctly configured. In particular:

• Confirm that the node is set to use the right credential.
• Check any field mappings or additional settings the node requires.
• If you’re using expressions to reference credential data, make sure the credential names in the expression exactly match those set up in the credentials panel.

5. Inspect Logs for Additional Error Details

If available, increase the logging verbosity or check the logs of your n8n Docker container to see if there are additional error messages. This extra information might help to pinpoint whether the error is due to authentication issues or a problem with the request itself.

By following these steps, you should be able to narrow down whether the issue is with the credential configuration, network accessibility, or node setup.

If the error persists, consider sharing additional details from your logs or reviewing the documentation of the specific service you’re connecting with to see if there are any extra requirements.