Problems when calling an API - windows

Question

We have two APIs that does a POST and GET requests. Both of them used to work perfectly fine but the API that does POST started giving an error:
Invoke-WebRequest : The underlying connection was: An unexpected error occurred on a receive.`
I have been trying to research for few days and all the KBs pointing to some sort of SSL/TLS and adding this piece of code:
[Net.ServicePointManager]::SecurityProtocol = "SystemDefault,Tls12, Tls11, Tls, Ssl3"
but I already had this code from the start. However, I cannot find a solution to my problem.
OS : Windows 2012
PowerShell Version: 4.0
function funName ($Val1, $Val2) {
[Net.ServicePointManager]::SecurityProtocol = "SystemDefault,Tls12, Tls11, Tls, Ssl3"
#[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
#[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12
$url = "https://someAPI/post.request/do-something"
$user = "username"
$pass = "password"
$pair = "$($user):$($pass)"
$encodedCreds = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($pair))
$basicAuthValue = "Basic $encodedCreds "
$Headers = #{
"Accept"="application/json"
Authorization = $basicAuthValue
}
$Body = #{
'#type' ='x'
parm1 = $Val1
parm2 = $Val2
}
#[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
Invoke-WebRequest -Uri $url -Headers $Headers -Method Post -Body $Body | Out-Null
}
## Deactivation Request ffffffff##
funName -RequestID Val1 adID Val2
As stated earlier, this used to work up until last week.

Answer 1

Set this to the top of your script:
Add-Type #"
using System.Net;
using System.Security.Cryptography.X509Certificates;
namespace myTrust
{
public class TrustAllCertsPolicy : ICertificatePolicy
{
public bool CheckValidationResult( ServicePoint srvPoint, X509Certificate certificate, WebRequest request, int certificateProblem)
{
return true;
}
}
}
"#
$AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols
[System.Net.ServicePointManager]::CertificatePolicy = New-Object myTrust.TrustAllCertsPolicy

Answer 2

I was working on a similar request to retrieve data from API and I found out that I was calling my function as funName -val1 1234 val2 9999 where I was missing "-" on my seconda parameter. As soon as I fixed that it starting working again funName -val1 1234 -val2 9999 . Thanks Stackoverflow community for the help on this.