Keycloak as IDP for Klipfolio - IDP initiated SSO (SAML)

I am trying to configure keycloak as IDP for Klipfolio which supports SSO with SAML. I have created a SAML client with Below configurations.

**Signature Algorithm ** - RSA_SHA1
SAML Signature Key Name - None
Name ID Format - email

when I try to access the url: root/auth/realms/{realm}/protocol/saml/clients/{client-name}
after login I am redirected to klipfolio SAML consume page but getting internal service error. Can someone please help me on this.

Thank you in advance.