AEM SSO suspending after click on item in welcome page menu

[alexs2380437]

Hi,

due to documentation https://docs.adobe.com/docs/en/cq/5-6-1/deploying/single_sign_on.html

I configured Auth Handler on page http://localhost:4502/system/console/configMgr

with options.

Link to login looks like http://localhost:4502/libs/cq/core/content/welcome.html?agi-user=xxx​

After redirecting from PHP as

if(isset($_GET['aem'])) {
  header('Location: http://localhost:4502/libs/cq/core/content/welcome.html?agi-user=xxx');
}

I redirected to welcome page really.

But when I am trying to click on left menu any item(Inbox, Tools e.g.) I am suspending to login form page:

With next link

localhost:4502/libs/granite/core/content/login.html?resource=%2Fdamadmin&$$login$$=%24%24login%24%24&j_reason=unknown&j_reason_code=unknown

Have anybody ideas what is wrong?