Workflow execution error

While executing the workflow from my studio, I am getting the below error.

RemoteException wrapping System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. 
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at UiPath.Service.UserServiceManagerExtensions.BeginOrUpdateSession(UserServiceManager manager, ImpersonableIdentity identity, CancellationToken ct)
   at UiPath.Service.AttendedService.<BeginOrUpdateSession>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at UiPath.CoreIpc.Server.<InvokeMethod>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at UiPath.CoreIpc.Server.<HandleRequest>d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at UiPath.CoreIpc.Server.<>c__DisplayClass4_2.<<-ctor>b__6>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at UiPath.CoreIpc.IOHelpers.<WithResult>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at UiPath.CoreIpc.IOHelpers.<WithTimeout>d__18`1.MoveNext()

Can someone tell me what is it refering to ? TIA

All programs getting "The given key was not present in the dictionary."

This link will help you

@Su_automator

The Given Key was not present error will appear If there is any issue while passing the argument, Check the arguments are correctly passed between workflows

Hope this helps you

Thanks