Invalid user when starting Cognos Controller

Cognos Controller 10.3.1
Microsoft Windows 2012 R2 Server

Error when you try to login to Cognos Controller client, after you have selected the database to use, and you have been logged in as a CAM user.

Error message:
System.Web.Services.Protocols.SoapException: Server was unable to process request. —> System.Exception: invalid_user

at Cognos.Controller.Proxy.SoapExtension.ServerExtension.ValidateCAMUser(SoapMessage& message)

at Cognos.Controller.Proxy.SoapExtension.ServerExtension.ProcessMessage(SoapMessage message)

at System.Web.Services.Protocols.SoapMessage.RunExtensions(SoapExtension[] extensions, Boolean throwOnException)

at System.Web.Services.Protocols.SoapServerProtocol.CreateServerInstance()

at System.Web.Services.Protocols.WebServiceHandler.Invoke()

at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()

— End of inner exception stack trace —

at Microsoft.VisualBasic.ErrObject.Raise(Int32 Number, Object Source, Object Description, Object HelpFile, Object HelpContext)

at Cognos.Controller.Common.RaiseErrCli.RaiseError(Int32 lErrNo, String sErrSource, String sErrDesc, String sErrHelpFile, Int32 lErrHelpContext)

at Cognos.Controller.Direct.ServerInfoD.GetServerInfo()

at CCR.AppContext.InitServerInfo()

at CCR.AppContext.Login()

Login to your windows computer as a user who have rights to use Cognos Controller.
Then it will work. This user is not added inside Cognos controller, and therefor can not login.

Other solutions: