Google SAML APP SSO integrate with php application

I am using the php SAML library for SAML integration in php applucation(SP) with google as IDP.
I followed the step for the configuration of SAML toolkit for PHP in this link.

• I add application SAML Test Connector (IdP w/ attr).
• I add the content of repository Github to my hosting to run PHP code.
• I defined the variable in demo1/settings.php

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But I am getting the response from google suit (IDP)

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Even I had tried he same code with Onelogin as IDP and it was working. Don’t know why it’s not working with Google as IDP.

Please Help! if anyone having an idea for the same.

Thanks in advance.