MetricSign
Start free
High severityauthentication

Power BI Refresh Error:
LOGIN_ERROR

What does this error mean?

Tableau Cloud returned error 401001 (LOGIN_ERROR) — unauthorized. The request was not authorized — authentication is required.

Common causes

  • 1The personal access token (PAT) used for authentication has expired or been revoked.
  • 2The authentication token was generated for a different Tableau site than the one being accessed.
  • 3No authentication credentials were included in the request.

How to fix it

  1. 1Generate a new personal access token in Tableau Cloud under My Account Settings.
  2. 2Ensure the token is included in the X-Tableau-Auth header of every authenticated request.
  3. 3Verify that the token was created for the correct Tableau site.

Frequently asked questions

What does Tableau error 401001 (LOGIN_ERROR) mean?

It means unauthorized — the request was not authorized — authentication is required.

How do I find the resource ID causing this error?

Use the corresponding Tableau REST API List endpoint (e.g. GET /sites/{siteId}/users) to retrieve valid IDs before passing them in update or delete requests.

Source · help.tableau.com/current/api/rest_api/en-us/REST/rest_api_concepts_errors.htm

Other authentication errors