Saml WantAuthnRequestsSigned

I am trying to configure Saml. I am getting an error. java.lang.IllegalArgumentException: Failed to resolve any signing credential

I think this is because I have not configured a certificate for signing the Saml responses and the IDP metadata is requesting it: IDPSSODescriptor WantAuthnRequestsSigned=“true”

I talked with the ID team and they said I can turn that off. So there are two questions, is the error related and if is there a way to turn the AuthnRequestsSigned off.