Logout with Tableau Online

Hello, I have an SSO with Auth0 as a idP and Tableau Online as a Service, and I’ve connected successfully with SAML, With this Addon: “SAML2 Web App”, but when an user is logout and another user login, new user can still see dashboards than previous user.

My configuration is like this: https://auth0.com/docs/protocols/saml/saml-apps/tableau-online
With logout callback setted to my logout php file.

And my logout php page is like:

$auth0 = new Auth0\SDK\Auth0([
‘domain’ => ‘…’,
‘client_id’ => ‘…’,
‘client_secret’ => ‘…’,
‘redirect_uri’ => ‘…’,
‘scope’ => ‘…’,
$return_to = ‘https://myurl.com/tableau/index.php’;
header('Location: ’ . $auth_api->get_logout_link($return_to, $client_id));

On the tableau online page just say “IdP is configured to support SAML single logout (SLO)”, but i doesn’t work, I deleted tableauonline cookies manually, but error still happens.

Can you help me if I have to make an additional code/setting?