Error: Communication Problem - Unknown problem with the authentication system was detected. Unable to login.


Issue
:  Error: Communication Problem - Unknown problem with the authentication system was detected. Unable to login.

Cause:
This could indicate that the ASP.NET application pool in the IIS configuration is set to the wrong version. PA Xerox Authentication server requires the .NET 2.0 runtime to be configured in IIS.

Solutions: 

Verify IIS is using a correct application pool.

Open the Windows Internet Information Services interface.
Click Application Pools and verify PAXEAuthAppPool has been installed and set to v2.0
Expand the website where PAXeroxAuthentication is installed.
Click on the PAXeroxAuthentication website and go to the Advanced Settings
Ensure the Application Pool in the General section is set to PAXEAuthAppPool.
If not, change it to reflect this Application Pool.
Click the Ok button.

Verify the self signed certificate has been installed and bound to the correct website.

Open the Windows Internet Information Services interface.
Click on the IIS server.
Click Server Certificates icon within the IIS section.
Ensure the XeroxAuthenticatioCeritifcate has been installed.
Click on the website where PAXeroxAuthentication is installed.
Click Bindings under the Actions section on the right hand menu
When the Site Bindings page is presented ensure the https type with Port 443 is visible.
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