Looking for logging into the Tableau Failed site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Tableau Failed site. After that you can login as usual with your login credentials.
https://kb.tableau.com/articles/issue/error-sign-in-failed-on-login-sceen-in-browser-after-upgrading-tableau-server
https://community.tableau.com/thread/188922
https://kb.tableau.com/articles/issue/sql-extract-refresh-fails-with-login-failed-for-user?lang=de-de
https://kb.tableau.com/articles/issue/sql-extract-refresh-fails-with-login-failed-for-user
https://kb.tableau.com/articles/issue/error-sign-in-failed-check-credentials-for-typos-and-confirm-that-you-can-access-the-database-directly-refreshing-salesforce-extract
https://kb.tableau.com/articles/issue/error-login-failed-for-user-run-as-username-editing-data-connection
https://www.tableau.com/de-de/support/known-issues
https://kb.tableau.com/articles/issue/error-sql-server-login-failed-for-user-domain-username-refreshing-extract?lang=de-de
https://kb.tableau.com/articles/issue/error-kerberos-authentication-failed-tableau-server-could-not-authenticate-you-automatically?lang=de-de
https://kb.tableau.com/articles/issue/error-sql-server-login-failed-for-user-domain-username-refreshing-extract
https://kb.tableau.com/articles/issue/error-kerberos-authentication-failed-tableau-server-could-not-authenticate-you-automatically
https://kb.tableau.com/articles/issue/errors-sign-in-failed-and-http-400-kerberos-authentication
https://kb.tableau.com/articles/issue/error-authentication-failed-signing-in-from-non-default-domain-using-saml