powershell - query terminate with unexpected error by send

Hi

If i take my demo script, with support of prtg query builder, i got a error with unexpected by send i startet this demo script directly on my server. i started Windows Powsershell ISE with run as Aministrator Rights

--- start ----  
$benutzer = "hans.mustermann"       
$passwort = "123456789"            
            
$uri = "http://127.0.0.1/api/table.json?content=sensors&columns=sensor&username=$benutzer&passhash=$passwort"
                   
$resulta = Invoke-RestMethod -Uri $uri -ContentType 'application/JSON'

$resulta
--- end -------

Erromessage

Invoke-RestMethod : Die zugrunde liegende Verbindung wurde geschlossen: Für den geschützten SSL/TLS-Kanal konnte keine Vertrauensstellung hergestellt 
werden..

+ $resulta = Invoke-RestMethod -Uri $uri -ContentType 'application/JSON ...
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

If i try to use the command for [ServerCertificateValidationCallback]::ignore(); its not working too

Do you have any clue, how can i easy to view - in the first step to view all data over prtg api. I dont want to use install-module prtg e.g.

Please advise
Thanks
Jochen

add-type @"
    using System.Net;
    using System.Security.Cryptography.X509Certificates;
    public class TrustAllCertsPolicy : ICertificatePolicy {
        public bool CheckValidationResult(
            ServicePoint srvPoint, X509Certificate certificate,
            WebRequest request, int certificateProblem) {
            return true;
        }
    }
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy

$result = Invoke-WebRequest -Uri "https://IpAddress/resource"