SimpleSAMLphp config problem ?

Question

Hi All, I have configured simplesamlphp(SSO) for my project, but it gives the below error .

     0: /var/simplesamlphp/lib/SAML2/Utils.php:104 (SAML2_Utils::validateSignature)
     1: [builtin] (call_user_func)
     2: /var/simplesamlphp/lib/SAML2/Message.php:210 (SAML2_Message::validate)
     3: /var/simplesamlphp/modules/saml2/lib/Message.php:190              (sspmod_saml2_Message::checkSign)
     4: /var/simplesamlphp/modules/saml2/lib/Message.php:709 (sspmod_saml2_Message::processResponse)
     5: /var/simplesamlphp/modules/saml/www/sp/saml2-acs.php:50 (require)
     6: /var/simplesamlphp/www/module.php:135 (N/A)

I saw the simplesamlphp documentation and video clibs having that file name "saml20-idp-hosted.php" . my simplesamlphp doesn't have file with this name . Pls help me . What error i am facing ?

Note : It can able to logged in to my site . which we have configured in in metadata . My simplesamlphp versio 6x .

Thanks in advance ....