Power shell to add node to SAM

here is the script I am running...

# This sample script shows how to use the Orion Discovery API to discover and import one node using WMI credentials.

# Load SwisPowerShell
Import-Module SwisPowerShell

# Swis connection info
$OrionServer = "localhost"
$Username = "#######"
$Password = "############################"

# Discovery parameters
$ip = "10.40.52.13"
$wmiCredentialsName = '#################'
$engindId = 1
$DeleteProfileAfterDiscoveryCompletes = "true"

$swis = Connect-Swis $OrionServer -UserName $Username -Password $Password

# Get the ID of the named WMI credential
$wmiCredentialsId= Get-SwisData $swis "SELECT ID FROM Orion.Credential WHERE Name=@name" @{name = $wmiCredentialsName}

$CorePluginConfigurationContext = ([xml]"
<CorePluginConfigurationContext xmlns='http://schemas.solarwinds.com/2012/Orion/Core' xmlns:i='http://www.w3.org/2001/XMLSchema-instance'>
<BulkList>
<IpAddress>
<Address>$ip</Address>
</IpAddress>
</BulkList>
<Credentials>
<SharedCredentialInfo>
<CredentialID>$wmiCredentialsId</CredentialID>
<Order>1</Order>
</SharedCredentialInfo>
</Credentials>
<WmiRetriesCount>1</WmiRetriesCount>
<WmiRetryIntervalMiliseconds>1000</WmiRetryIntervalMiliseconds>
</CorePluginConfigurationContext>
").DocumentElement

$CorePluginConfiguration = Invoke-SwisVerb $swis Orion.Discovery CreateCorePluginConfiguration @($CorePluginConfigurationContext)

$StartDiscoveryContext = ([xml]"
<StartDiscoveryContext xmlns='http://schemas.solarwinds.com/2012/Orion/Core' xmlns:i='http://www.w3.org/2001/XMLSchema-instance'>
<Name>Script Discovery $([DateTime]::Now)</Name>
<EngineId>$engindId</EngineId>
<JobTimeoutSeconds>3600</JobTimeoutSeconds>
<SearchTimeoutMiliseconds>2000</SearchTimeoutMiliseconds>
<SnmpTimeoutMiliseconds>2000</SnmpTimeoutMiliseconds>
<SnmpRetries>1</SnmpRetries>
<RepeatIntervalMiliseconds>1500</RepeatIntervalMiliseconds>
<SnmpPort>161</SnmpPort>
<HopCount>0</HopCount>
<PreferredSnmpVersion>SNMP2c</PreferredSnmpVersion>
<DisableIcmp>false</DisableIcmp>
<AllowDuplicateNodes>false</AllowDuplicateNodes>
<IsAutoImport>true</IsAutoImport>
<IsHidden>$DeleteProfileAfterDiscoveryCompletes</IsHidden>
<PreferredPollingMethod>1</PreferredPollingMethod>
<PluginConfigurations>
<PluginConfiguration>
<PluginConfigurationItem>$($CorePluginConfiguration.InnerXml)</PluginConfigurationItem>
</PluginConfiguration>
</PluginConfigurations>
</StartDiscoveryContext>
").DocumentElement

$DiscoveryProfileID = (Invoke-SwisVerb $swis Orion.Discovery StartDiscovery @($StartDiscoveryContext)).InnerText

Write-Host -NoNewline "Discovery profile #$DiscoveryProfileID running..."

# Wait until the discovery completes
do {
Write-Host -NoNewline "."
Start-Sleep -Seconds 1
$Status = Get-SwisData $swis "SELECT Status FROM Orion.DiscoveryProfiles WHERE ProfileID = @profileId" @{profileId = $DiscoveryProfileID}
} while ($Status -eq 1)

# If $DeleteProfileAfterDiscoveryCompletes is true, then the profile will be gone at this point, but we can still get the result from Orion.DiscoveryLogs

$Result = Get-SwisData $swis "SELECT Result, ResultDescription, ErrorMessage, BatchID FROM Orion.DiscoveryLogs WHERE ProfileID = @profileId" @{profileId = $DiscoveryProfileID}

# Print the outcome
switch ($Result.Result) {
0 {"Unknown"}
1 {"InProgress"}
2 {"Finished"}
3 {"Error"}
4 {"NotScheduled"}
5 {"Scheduled"}
6 {"NotCompleted"}
7 {"Canceling"}
8 {"ReadyForImport"}
}
$Result.ResultDescription
$Result.ErrorMessage

if ($Result.Result -eq 2) { # if discovery completed successfully
# Find out what objects were discovered
$Discovered = Get-SwisData $swis "SELECT EntityType, DisplayName, NetObjectID FROM Orion.DiscoveryLogItems WHERE BatchID = @batchId" @{batchId = $Result.BatchID}
"$($Discovered.Count) items imported."
$Discovered
}

I am getting the below errors.

Invoke-SwisVerb : Verb Orion.Discovery.CreateCorePluginConfiguration cannot unpackage parameter 0 of type
SolarWinds.Data.Providers.Orion.Verbs.Discovery+CorePluginConfigurationContext
At C:\Users\Administrator\Desktop\add node .ps1:40 char:28
+ ... iguration = Invoke-SwisVerb $swis Orion.Discovery CreateCorePluginCon ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Invoke-SwisVerb], FaultException`1
+ FullyQualifiedErrorId : SwisError,SwisPowerShell.InvokeSwisVerb
Invoke-SwisVerb : ProvideFault failed, check fault information.
At C:\Users\Administrator\Desktop\add node .ps1:67 char:24
+ ... rofileID = (Invoke-SwisVerb $swis Orion.Discovery StartDiscovery @($S ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Invoke-SwisVerb], FaultException`1
+ FullyQualifiedErrorId : SwisError,SwisPowerShell.InvokeSwisVerb

This was a script off of GitHub, you would think it should work.....  Actually you would think SolarWinds themselves would have this script...