Argument #1 ($nameIdPolicy) must be of type ?array, string given

Hey @chdeepak Have you got a solution for this?

I find it hard to believe that one has report this sooner.

I think it's a side effect of this other issue,

https://www.drupal.org/project/simplesamlphp_auth/issues/3340606#comment... 💬 Document simplesamlphp 2.x directory change (www to public) Active

Got to fix this issue by updating the following line in authsources.php

from

'NameIDPolicy' => 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent',

to

'NameIDPolicy' => ["Format" => Constants::NAMEID_PERSISTENT],

And don't forget to add this at the top:

use SAML2\Constants;