Puppet Community

Hi, re dsc_sqlsetup of the sqlserverdsc module.
I am having trouble with dsc_sqlsetup.
If I run this for a basic set up, it works fine.
dsc_sqlsetup { 'Install_SQL_Instance':
        dsc_action              => 'Install',
        dsc_instancename        => 'IT',
        dsc_features            => 'SQLENGINE',
        dsc_sourcepath          => 'C:\\SQLServerFull',
        dsc_sqlsysadminaccounts => ['DOMAIN\\Administrator'],
      }

But I need to configure it with mixed mode setting, and when I configure as per below, I get error - Error: dsc_sqlsetup[{:name=>"Install_SQL_Instance", :dsc_instancename=>"IT"}]: Updating: Nothing returned.

dsc_sqlsetup { 'Install_SQL_Instance':
        dsc_action              => 'Install',
        dsc_instancename        => 'IT',
        dsc_features            => 'SQLENGINE',
        dsc_sourcepath          => 'C:\\SQLServerFull',
        dsc_sqlsysadminaccounts => ['DOMAIN\\Administrator'],
        dsc_securitymode        => 'SQL',
        dsc_sapwd               => {
          user     => 'sa',
          password => Sensitive('StrongSAPassword123!'),
        },
      }

I have wracked my brains out trying lots of different things but I cant for the life of me get this isntance set up with sql/mixed mode. Can anyone offer any advise please