idB v4.1.0.0 DEV About Page Error

Error
System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Could not load type 'Unify.Framework.CurrentVersion`1' from assembly 'Unify.Framework.Service.Interfaces, Version=4.0.0.0, Culture=neutral, PublicKeyToken=84b9288cb2633de4'. (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is: System.TypeLoadException: Could not load type 'Unify.Framework.CurrentVersion`1' from assembly 'Unify.Framework.Service.Interfaces, Version=4.0.0.0, Culture=neutral, PublicKeyToken=84b9288cb2633de4'. at Unify.Product.IdentityBroker.FIMEnginePlugInFactory.get_PlugInVersion()
at Unify.Framework.PlugInEngineToPlugInEngineInformationAdapter`1.Transform(IUnifyEnginePlugInFactory`1 sourceValue)
at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
at System.Linq.Enumerable.<UnionIterator>d__88`1.MoveNext()
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at SyncInvokeGetNonServicePlugInInformations(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at...).