Certificate Authentication doesn't work with safeguard-ps

Hi All,

I am facing a problem when trying to set up certificate authentication for an AD based user in SPP. 

Background:

The checkbox for "Require Certificate Authentication" is enabled.

And the user personal store does have the required certificate with client authentication enabled.

Login via UI with certificate authentication is successful with the same certificate.

However, when trying with safeguard-ps module, I get an error that the "OperationStopped: 400: Bad Request -- Invalid credentials"

The root and intermediate CA are alread

 
The thumbprint I am using is being reported by: 
> Get-ChildItem Cert:\CurrentUser\My

As far as I know the thumbprint reported here is calculated using SHA-1 algorithm which anyway the safeguard-ps requires as per their GitHub documentation.

"Client certificate authentication is also available in Connect-Safeguard. This can be done either using a PFX certificate file or a SHA-1 thumbprint of a certificate stored in the Current User personal certificate store."

Question:
Could anybody help here with what might be going wrong here? Any inpiuts would be really appreciated.