While run the process below error showing please hepl to resolve this issue

Error ERROR Validation Error Internal constraint exception while running constraint with name ‘Constraint’ against activity of type UiPath.UIAutomationNext.Activities.NCheckState with name ‘Data Found or not Check App State ‘A PHP’’. Exception was: System.NullReferenceException: Object reference not set to an instance of an object.
at System.Activities.WorkflowApplication.Invoke(Activity activity, IDictionary2 inputs, WorkflowInstanceExtensionManager extensions, TimeSpan timeout) at System.Activities.WorkflowInvoker.Invoke(Activity workflow, IDictionary2 inputs, TimeSpan timeout, WorkflowInstanceExtensionManager extensions)
at System.Activities.WorkflowInvoker.Invoke(Activity workflow, IDictionary2 inputs) at System.Activities.Validation.ActivityValidationServices.RunConstraints(ChildActivity childActivity, ActivityCallStack parentChain, IList1 constraints, ProcessActivityTreeOptions options, Boolean suppressGetChildrenViolations, IList`1& validationErrors) Framework/Process.xaml


Plz confirm at which step you are getting this error?

Object reference not set to an instance occurs if a variable is not initialized and it doesnt have any value during execution.


getting error in Invoke Execution


Some argument that you are passing in is not initialized…Can you check that


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