I facing issues installing SolidCP server release 1.2.0 on a stand alone (workgroup) Windows Server 2016 server as the first component.

Even though that it is stated that the user account got created

[03.04.2017 08:08:59] START: Creating Windows user account…
[03.04.2017 08:08:59] INFO: Creating Windows user account “SCPServer”
[03.04.2017 08:08:59] END: Created windows user account

it is not. This results in:

[03.04.2017 08:09:00] ERROR: Failed to execute ‘SolidCP.Setup.Actions.CreateWebApplicationPoolAction’ type of action.
[03.04.2017 08:09:00] ERROR: Here is the original exception…
System.Runtime.InteropServices.COMException (0x80090016): Keyset does not exist. (Ausnahme von HRESULT: 0x80090016)
bei Microsoft.Web.Administration.Interop.IAppHostWritableAdminManager.CommitChanges()
bei Microsoft.Web.Administration.ConfigurationManager.CommitChanges()
bei Microsoft.Web.Administration.ServerManager.CommitChanges()
bei SolidCP.Setup.Actions.CreateWebApplicationPoolAction.SolidCP.Setup.Actions.IInstallAction.Run(SetupVariables vars)
bei SolidCP.Setup.Actions.BaseActionManager.Start()

Any ideas?