I am trying to install Sitecore 9.0 on Windows Server 2012 Update R2.

I have followed all steps mentioned in this article: https://blogs.perficient.com/microsoft/2017/10/how-to-install-sitecore-9-with-the-sitecore-install-framework/

Here is the current Status:

1. Powershell version: 5.2
2. SOLR 6.6.2 with SSL enabled
3. Successfully executed prerequisites i.e.

• Register-PSRepository -Name SitecoreGallery -SourceLocation https://sitecore.myget.org/F/sc-powershell/api/v2
• Install-Module SitecoreInstallFramework
• Install-Module SitecoreFundamentals
• Import-Module SitecoreFundamentals
• Import-Module SitecoreInstallFramework

Finally, when i tried to execute Sitecore installation powershell script, i am getting below exception...

Install-SitecoreConfiguration : No matching commands include a parameter named 'Signer'.  Check the spelling of the parameter name, 
and then try again.
Parameter name: Signer
At C:\sitecore\install\sc9-v2.ps1:18 char:1
+ Install-SitecoreConfiguration @certParams -Verbose
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Install-SitecoreConfiguration 

Please suggest, how can we resolve this issue?

Thanks,