Error in TFS Release Management Server after Upgrading to Update 3

Question

Some weird and unexplained error logged in InRelease aka (Release Management) server event log after upgrading Release Management Update 1 to update 3.
Below error started getting logged only after upgrading to Update 3.
Even though we started the Inrelease Server and all agents but no luck.
Any immediate help would be much helpful.
----------------------------------- EVENT LOG ERROR ------------------------------------
Timestamp: 12/15/2014 10:22:18 AM
Message: 'LambdaValue>' is not of type 'ServerActivity'. When loading this instance you must ensure that the activity with name 'LambdaValue>' implements
'ServerActivity'.: \r\n\r\n at
System.Activities.ActivityInstance.System.Activities.Runtime.ActivityInstanceMap.IActivityReference.Load(Activity activity, ActivityInstanceMap instanceMap) at System.Activities.Runtime.ActivityInstanceMap.InstanceList.Load(Activity activity, ActivityInstanceMap
instanceMap) at System.Activities.Runtime.ActivityInstanceMap.LoadActivityTree(Activity rootActivity, ActivityInstance rootInstance, List1
secondaryRootInstances, ActivityExecutor executor) at System.Activities.Runtime.ActivityExecutor.OnDeserialized(Activity workflow, WorkflowInstance workflowInstance) at System.Activities.Hosting.WorkflowInstance.InitializeCore(IDictionary2 workflowArgumentValues,
IList1
workflowExecutionProperties) at System.Activities.Hosting.WorkflowInstance.Initialize(Object deserializedRuntimeState, DynamicUpdateMap updateMap) at System.Activities.WorkflowApplication.LoadCore(DynamicUpdateMap updateMap, TimeoutHelper timeoutHelper, Boolean
loadAny, IDictionary2 values) at System.Activities.WorkflowApplication.Load(Guid instanceId, TimeSpan timeout) at System.Activities.WorkflowApplication.Load(Guid instanceId) at Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.WorkflowInstance.WorkflowInstanceCacheSingleton.<.cctor>b__1(WorkflowApplication
app, Guid id) at
Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.WorkflowInstance.WorkflowInstanceCache.CreateApplicationInCache(CreateParameters createParameters, Guid id) at Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.WorkflowInstance.WorkflowInstanceCache.GetInstance(CreateParameters
createParameters, Guid id) at Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.WorkflowInstance.CachedWorkflowInstanceLoader.GetInstance(DeploymentLog log, CreateParameters createParams) at Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.DeploymentControllerServiceProcessor.ContinueDeploymentWithFinalComponentState(DeploymentLog
log) at Microsoft.TeamFoundation.Release.ServiceProcessor.Processor.DeploymentControllerServiceProcessor.ContinueDeployment(String log)
Category: General
Priority: -1
EventId: 0
Severity: Error
Title:
Machine: **********
Application Domain: /LM/W3SVC/1/ROOT-1-130630102320068767
Process Id: 6628
Process Name: C:\Windows\SysWOW64\inetsrv\w3wp.exe
Win32 Thread Id: 1344
Thread Name:
Extended Properties:

Answer 1

Dear Charles-Li,
Thank you so much for your reply.
we started using  Release Management Update 1  and it was worked perfectly fine.  then we move to upgrade existing Release Management(server,
Database and agent) with Update 3, which we did, and its working fine  except lots of error as mentioned in above thread, are getting logged in server event log at regular interval till now(3-4 errors every second).
even though lots of error are getting logged but we are not facing any issue while using Release Management with update 3.
But i am bit curious to know out reason for getting those error.
<<clean
the cache folder and restrat Release Management and try again>>
already tried but no luck.
Thanks!!