[NullReferenceException] Object reference not set to an instance of an object.
   at RKdev.EWay.Opentao.dev.Business.AuthenticationSystemIntegration.Core.Imp.Workers.AuthenticationSystemIntegrator.Delete(AuthenticationSystemType authenticationSystem, NameValueCollection parameters) in C:\ot\release\dev.Business.AuthenticationSystemIntegration.Core\Sources\Imp\Workers\AuthenticationSystemIntegrator.imp.IAuthenticationSystemIntegrator.cs:line 186
   at RKdev.EWay.Opentao.dev.Business.AuthenticationSystemIntegration.Service.Imp.Workers.AuthenticationSystemIntegratorService.DoDelete(AuthenticationSystemType authenticationSystem, NameValueCollection parameters) in C:\ot\release\dev.Business.AuthenticationSystemIntegration.Service\Sources\Imp\Workers\AuthenticationSystemIntegratorService.Generated.cs:line 84
   at RKdev.EWay.Opentao.dev.Common.AbstractServices.Pub.Abstracts.AbstractService`2.ExecuteProtectedAction[TAnswer](Func`1 action)