Error: "This browser or app may not be secure" signing in to Tableau Online from Prep Builder

Published: 20 Oct 2020
Last Modified Date: 21 Oct 2020


When a user that is set to Google Authentication in Tableau Online tries to log in to Tableau Online from Tableau Prep, the authentication is not successful, due to the following error:

This browser or app may not be secure.
Try using a different browser. If you're already using a supported browser, you can refresh your screen and try again to sign in.


  • Tableau Online
  • Tableau Prep Builder


As a possible workaround, switch the user's authentication type in Tableau Online to Tableau instead of Google. For more information, see Set the User Authentication Type.


This behavior is related to a known issue that is currently under investigation.
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