PowerShell Script Failing with Auth Header and 500 Internal Server Error for REST API

Hi everyone,

I'm encountering multiple issues with the PowerShell script that interacts with a REST API to execute batch jobs in FDMEE. The script is supposed to send an HTTP request with a Basic Authorization header, but I'm facing the following problems:

1. "Invalid or Missing Authorization Header" Error: When I visit the API URL directly in the browser, I get:

      {
      "links": [],
      "status": 9,
      "details": "EPMFDM-ERROR: Invalid or Missing Authorization Header in request"
      }

  2."Internal Server Error (500)": When running the script, it often goes to the catch block and displays a 500 Internal Server Error. Here's the error message I receive in PowerShell:

        PS>TerminatingError(Invoke-RestMethod): "Request failed."
        Error encountered in PowerShell Script.

Here is the script I'm using:
 #HTTP Basic Authorization. Contains encrypted username and password encoded to base64 string.
$headers = @{Authorization = 'Basic encryptedpassword';}

# Set parameter values
$jobName = $args[0]
$uri = http://server.comm.iocs.address.com:0000/aif/rest/V1/jobs

# Monitor status of current batch run
Write-Output "Checking Job Status..."
Start-Sleep -Seconds 5

$restResponse = Invoke-RestMethod -Uri $uri -Method Get -Headers $headers -ContentType "application/json"
$lastJobID = $restResponse.items[0].jobID

$payload = @{
jobType = "BATCH"
jobName = $jobName
} | ConvertTo-Json

# Establish REST connection and execute batch job using REST API
$restResponse = Invoke-RestMethod -Uri $uri -Method Post -Body $payload -Headers $headers -ContentType "application/json"
$uri = $restResponse.links[0].href

# Display initial status of batch
Write-Output "See below status of batch run..."
$restResponse = Invoke-RestMethod -Uri $uri -Method Get -Headers $headers -ContentType "application/json"
$currentJobID = $restResponse.jobID

Write-Output "Last Job ID: $lastJobID"
Write-Output "Current Job ID: $currentJobID"
}
catch {
Write-Output "Error encountered in PowerShell Script.."
Write-Output $_.Exception.Message

if ($_.InvocationInfo) {
Write-Output "Error in script: $($_.InvocationInfo.ScriptName)"
Write-Output "Error on line: $($_.InvocationInfo.ScriptLineNumber)"
Write-Output "Error in command: $($_.InvocationInfo.Line)"
}

if ($_.Exception.Response) {
Write-Output "HTTP Status Code: $($_.Exception.Response.StatusCode.Value__)"
Write-Output "Status Description: $($_.Exception.Response.StatusDescription)"
Write-Output "Response Content: $($_.Exception.Response.Content)"
}

exit 1
}

Despite my efforts, the request still fails with the "Invalid or Missing Authorization Header" error and occasionally hits a 500 Internal Server Error. Here are the steps I've taken to debug the issues:

1. Checked Base64 Encoding: Confirmed that the credentials are correctly encoded in Base64.
2. Verified Header Format: Ensured that the Authorization header is correctly formed and included in the request.
3. Tested with Postman: Manually tested the API request with Postman using the same Authorization header, and I'm getting the same header authorization error.
4. Added Detailed Error Logging: Included more detailed error logging in the catch block to capture HTTP status codes and response content.

I'm looking for advice on what might be causing these issues in the PowerShell script and how I can resolve them. Any insights or suggestions would be greatly appreciated!