SimpleSAMLphp shows saml2-acs.php not found (error 404) when integrating with Microsoft Azure Directory SSO using SAML2

I have created a link from my web directory such that https://resolute.organization.in/sso points to the simplesaml directory /var/www/simplesamlphp/www

My simpleSAML configuration page:

The complete link https://resolute.organization.in/sso/module.php/saml/sp/saml2-acs.php/default-sp shows 404 Not Found while testing Authentication Sources --> default-sp.

My config.php:

$config = ['baseurlpath' => 'https://resolute.organization.in/sso/',
          'secretsalt' => 'my_secret_salt',
          'auth.adminpassword' => 'my_admin_pass',
          ];

Rest all are default values in config.php

My authsources.php:

$config = [
    'admin' => [
         'core:AdminPassword',
    ],
    'default-sp' => [
        'saml:SP',
        'entityID' => 'https://resolute.organization.in/',
        'idp' => 'https://sts.windows.net/{some-unique-key}/', //From metadata.xml for the app with entity ID in AD as *https://resolute.organization.in/*
        'discoURL' => null,
        'NameIDFormat' => 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent',
        'simplesaml.nameidattribute' => 'eduPersonTargetedID',
    ],
]

My metadata array in saml20-idp-remote.php:

 $metadata['https://sts.windows.net/{some-unique-key}/'] = array (
   'entityid' => 'https://sts.windows.net/{some-unique-key}/',
   'contacts' =>
   array (
   ),
   'metadata-set' => 'saml20-idp-remote',
   'SingleSignOnService' =>
   array (
     0 =>
     array (
       'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
       'Location' => 'https://login.microsoftonline.com/{some-unique-key}/saml2',
     ),
     1 =>
     array (
       'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
       'Location' => 'https://login.microsoftonline.com/{some-unique-key}/saml2',
     ),
   ),
   'SingleLogoutService' =>
   array (
     0 =>
     array (
       'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
       'Location' => 'https://login.microsoftonline.com/{some-unique-key}/saml2',
     ),
   ),
   'ArtifactResolutionService' =>
   array (
   ),
   'NameIDFormats' =>
   array (
   ),
   'keys' =>
   array (
     0 =>
     array (
       'encryption' => false,
       'signing' => true,
       'type' => 'X509Certificate',
       'X509Certificate' => '{really_long_key}',
     ),
   ),
 );

My Federation page:

The [show metadata] link shows 404 as well, the link in the URL bar in this case is:

https://resolute.organization.in/sso/module.php/saml/sp/metadata.php/default-sp?output=xhtml

IdP metadata link shows the metadata array properly.

Please help me out with what am I missing here as I have been breaking my head over this for a few days now.

It depends on how php handles the url parameters and occurs when using php-fpm either with NGINX or Apache mpm_worker/event. In order to fix this, set cgi.fix_pathinfo=1 in php.ini