"Get output failed" and then displays exactly the output I expected

I'm trying to create a monitor script, and no matter what I do, I get "Get output failed". Next to this message is the output that was generated, which is exactly the output I was expecting. I'm extremely confused by this. What am I doing wrong?

My script:

$port = $args.get(0)

$url = "http://${Node.DNS}`:$port"

$req = [system.Net.WebRequest]::Create($url)

try {

    $res = $req.GetResponse()

}

catch [System.Net.WebException] {

    $res = $_.Exception.Response

}

[int]$res.StatusCode

$exitCode = 0

Output:

Output: ==============================================

403