Power BI: Attempting to update parameter vi PowerShell API call

I am having some difficulties updating a dataset parameter via the Power BI rest api using a PowerShell script.

I have based my script on these resources:

https://docs.microsoft.com/en-us/rest/api/power-bi/datasets/updateparameters https://community.powerbi.com/t5/Developer/Update-parameters-through-Powershell/td-p/1167203

I am pretty sure I got the syntax right, but the script sometimes returns an error, and I can't see any change in the dataset after running it.

I have defined a string parameter named ReportVersion which I am trying to update. The parameter has "enable load" checked off and is visible in the report.

This is how I attempt to do it:

Import-Module MicrosoftPowerBIMgmt

Connect-PowerBIServiceAccount

$datasetId = "my dataset id"

$urlUpdateParams = "https://api.powerbi.com/v1.0/myorg/datasets/$($datasetId)/Default.UpdateParameters"

$body = '{
    "updateDetails": [
    {
        "name": "ReportVersion",
        "newValue": "2.0"
    }
    ]
}'

$content = 'application/json'
                
Invoke-PowerBIRestMethod -Url $urlUpdateParams -Method POST -Body $body -ContentType $content

Disconnect-PowerBIServiceAccount

The error I get looks like this:

At C:\...\Power BI report upload tool 10.ps1:83 char:17
+ ...             Invoke-PowerBIRestMethod -Url $urlUpdateParams -Method PO ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   + CategoryInfo          : WriteError: (Microsoft.Power...werBIRestMethod:InvokePowerBIRestMethod) [Invoke-PowerBIRestMethod], AggregateException
   + FullyQualifiedErrorId : One or more errors occurred.,Microsoft.PowerBI.Commands.Profile.InvokePowerBIRestMethod

Can you help me pinpoint what is going wrong?

Thanks in advance,

Mike