PS2013 Workflow error

Hi,

I'm trying to create a simple workflow for PS2013 with Sharepoint Designer, using a PS2013 Online environment.

My WF has a second step in which an approval by a specific user is required. I've used the "Assign a task" action to create the approval task. The Workflow has been published to PWA without any problem.

I've created a project to test the it, but when I reached the step with the Approval action the workflow was cancelled with the following error:

RequestorId: da90cc78-7900-33e7-38f4-d6f6a2d52ef7. Details: System.ArgumentException: AssignedTo at System.Activities.Statements.Throw.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)

Any help would be appreciated.

Regards,

Fabrizio.