connection closed by Palo Alto device

[salimeremtoulah]

When connecting to FW , and after submitting my credential I got the following error:

Exception calling "DownloadString" with "1" argument(s): "The underlying connection was closed: An unexpected error occ
urred on a send."
At C:\Windows\system32\WindowsPowerShell\v1.0\Modules\poweralto\poweralto-master\poweralto.psm1:273 char:50

•     $ApiKey = ([xml]$WebClient.DownloadString <<<< ("https://$Address/api/?type=keygen&user=$user&password=$($cre
  

d.getnetworkcredential().password)"))
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException

Thanks!