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Error: "Tableau Server API Request (Sign-in) Error Code 401001: Signin Error -- Error signing in to Tableau Server" with Publish to Tableau Server tool

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Created/Edited - 4/19/2026 by Sophia Cooper | Alteryx

Summary

Error running workflows containing the Publish to Tableau Server tool.

Issue

The following error is seen when a workflow that contains the Publish to Tableau Server tool is run on the Server.

Tableau Server API Request (Sign-in) Error Code 401001: Signin Error -- Error signing in to Tableau Server.

This error may also be seen:

Iteration #1: Tool #11: Error transferring data: URL using bad/illegal format or missing URL

Environment

Alteryx Server
- All versions
Tableau Online
- Configured for Multi-factor Authentication (MFA)
Publish to Tableau Server tool

Cause

Multi-factor authentication (MFA) is configured on the Tableau Online site. After switching to MFA on Tableau Online, the Publish To Tableau Server tool will no longer operate because authentication will require the use of a Personal Access Token . This is due to the requirements of Tableau's API, which only supports MFA via the use of Personal Access Tokens.

Resolution

Diagnosis

Confirm with your Tableau Administrator that MFA is enabled on your site. If so, see solution A.
If it is not, please see Solution B.

Solution A

Replace the Publish to Tableau Server tool with the Tableau Output tool and use the authentication method "Personal Access Token."

Refer to this article for steps on how to resolve this issue.

Solution B

Contact Alteryx Support.

Additional Information

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