The wsdl schema that was used to create this configuration file contained a 'RequireIssuerSerialReference' assertion for ...

The wsdl schema that was used to create this configuration file contained a 'RequireIssuerSerialReference' assertion for a X509Token.  This can not be represented in configuration, you will need to programatically adjust the appropriate X509SecurityTokenParameters.X509KeyIdentifierClauseType to X509KeyIdentifierClauseType.IssuerSerial.  The default of X509KeyIdentifierClauseType.Thumbprint will be used, which may cause interop issues.