Unable to get correct key/value pair from a Map Function - Puppet

Question

I am getting the following error in my puppet catalog.

/Stage[main]/Scconfig::Genetecauthrole/Dsc[COSCRole-GenetecAuthRole]: Could not evaluate: unsupported type NilClass of value ''

Below is the Json .

"authrole":
    {
        "genetecauth_role":
        {
            "Id" : "526b3508-dc4b-49fe-a651-ec877b93f7b9",
            "Name" : "SCaaSAuthRole",
            "Partition" : "Root",
            "PrimaryServer" : "%{facts.securitycenterserverguid}",
            "Type" : "AuthRole",
            "RoleSubtype" : "aaccf493-6b59-4aac-8ae2-3682d34fdff5",
            "UseTables" : false,
            "Enabled" : "True",
            "InstanceCount" : 1,
            "roleproperties":
            [
                {
                    "roleproperty":"GroupClaimType",
                    "propertyvalue":"groups"
                },
                {
                    "roleproperty":"UsernameClaimType",
                    "propertyvalue":"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn"
                },
                {
                    "roleproperty":"GroupNamesFormat",
                    "propertyvalue":"Unspecified"
                },
                {
                    "roleproperty":"IssuerName",
                    "propertyvalue":"https://login.microsoftonline.com/7ba8l2qb-4660-4a19-802e-8d015a17e167/v2.0/.well-known/openid-configuration"
                },
                {
                    "roleproperty":"ClientId",
                    "propertyvalue":"55622248-fb88-4034-9194-cd097db869a2"
                },
                {
                    "roleproperty":"Group",
                    "propertyvalue":"ApplicationGroup"
                },
                {
                    "roleproperty":"AcceptedDomainNames",
                    "propertyvalue":"somedomain.COM"
                },
                {
                    "roleproperty":"ExtraScopes",
                    "propertyvalue":"api://5562ce48-fb88-4224-9194-cd097db869a2/userread"
                }
            ]   
        }
    }

I tested my function the following way

function scconfig::normalizedroleproperties(String $lookupkey) >> Hash{
      info("Looking up value for ${lookupkey}")

      #$stringsplit = "${lookupkey}.roleproperties"

      $finddata= lookup($lookupkey)
      $data = $finddata['roleproperties']
      # $json = parsejson($hash)
      # $data = $json["${lookupkey}"]['roleproperties']
      $transformed_data = $data.map |$key, $value| {
            $temp = $value.map |$key2, $value2| {
                  if $key2 == 'roleproperty' {
                        {'key' => $value2}
                  }elsif $key2 =='propertyvalue'{
                        {'value' => $value2}
                  }
            }

            merge($temp[0],$temp[1])
      }

      return $transformed_data
}

My test is shown below:

function scconfig::normalizedroleproperties() >> Hash{
      $hash = file('C:\\users\\cloudadmin\\Desktop\\Roles.json')
      $json = parsejson($hash)
      $data = $json['authrole']['genetecauth_roleproperties']
      $temp = $data.map |$key, $value| {
            $temp = $value.map |$key2, $value2| {
              if $key2 == 'roleproperty' {
                      {'key' => $value2}
              }elsif $key2 =='propertyvalue'{
                      {'value' => $value2}
              }
            }
            merge($temp[0],$temp[1])
      }
      $transformed_data = $temp
      return $transformed_data
}
$test = scconfig::normalizedroleproperties()
info("The outcome is: ${test}")

Result :

The outcome is: [{key => GroupClaimType, value => groups}, {key => UsernameClaimType, value => http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn}, {key => GroupNamesFormat, value => Unspecified}, {key => IssuerName, value => https://login.microsoftonline.com/7ba8d2ui-4660-4a19-802e-7d015a17e167/v2.0/.well-known/openid-configuration}, {key => ClientId, value => 6662cb48-fb88-4034-9194-cd097db869a2}, {key => Group, value => ApplicationGroup}, {key => AcceptedDomainNames, value => somedomain.COM}, {key => ExtraScopes, value => api://5562cb48-fb88-40680-9194-cd097db869a2/userread}]

Below is my DSC resource

class scconfig::gcauthrole {
        require Class['scconfig::coserveradmin']
        # Get DSC Module dependencies to use dsc-lite
        $module = osconfig::getdscmodule()

        # Add Genetec Authentication role to security center
        #test
        $properties = lookup('authrole.genetecauth_role')
        # $data = $properties['roleproperties']
        # # $json = parsejson($hash)
        # # $data = $json["${lookupkey}"]['roleproperties']
        # $transformed_data = $data.map |$key, $value| {
        #         $temp = $value.map |$key2, $value2| {
        #                 if $key2 == 'roleproperty' {
        #                         {'key' => $value2}
        #                 }elsif $key2 =='propertyvalue'{
        #                         {'value' => $value2}
        #                 }
        #         }

        #         merge($temp[0],$temp[1])
        # }
        #$roleproperties = lookup('authrole.genetecauth_roleproperties')
        dsc{'COSCRole-GAuthRole':
                resource_name => 'COSCRole',
                module        => $module,
                #properties    => $properties,
                properties    => {
                                        id             => $properties['Id'],
                                        name           => $properties['Name'],
                                        partition      => $properties['Partition'],
                                        primaryserver  => $properties['PrimaryServer'],
                                        type           => $properties['Type'],
                                        rolesubtype    => $properties['RoleSubType'],
                                        usetables      => $properties['UseTables'],
                                        enabled        => $properties['Enabled'],
                                        instancecount  => $properties['InstanceCount'],
                                        roleproperties => {
                                                'dsc_type'       => 'MSFT_KeyValuePair[]',
                                                #'dsc_properties' => $transformed_data,
                                                'dsc_properties' => scconfig::normalizedroleproperties('authrole.genetecauth_role'),
                                        },
                },
        }
}

However, when I feed the function to my dsc resource I get the above error. I think there is something I am doing in my function which is causing the problem. It is most likey something very simple but I can't seem to find out. Any help would be appreciated.