Authentication Error

I am working with authenticating Signers in the ceremony and when we try to set the signers to the default option (email) -- the package creation returns with a 400 error. This is the return error Could not send the package. Exception: The remote server returned an error: (400) Bad Request. HTTP POST on URI //removed the url for security purposes Optional details: : {"technical":"signer: 10fd198b611041c5b53295fba2224f6c does not have authentication method in package: 45NfxUnHfm-iEijqcRl5V2oCOlw=","messageKey":"error.validation.transactionSend.noSignerAuthMethod","message":"The transaction cannot be sent because an authentication method is not defined for all recipients.","code":400,"name":"Validation Error"}