2020.R2(S4):Shift Validation Update- Exception thrown when no shifts to update

Technically, this story is still in DIT, but since I have other stories and automation to work on, I logged this defect just to keep track of QA progress.

If there are no Cashier shifts to validate, the below exception is thrown. I tested this in MMS as well and no exception was thrown (it said it was successful, which probably doesn't make sense either)

Environment: JAT
build #: CFA - 20.2.0.2988
Store: 70049 Truett's Grill
Date: 2-12-2020
URL: https://m.inform.jatesting.cfahome.com/#/Administration/HelpDesk
Script: Shift Validation Status Update

1. Navigate to URL
2. Select the above script
3. Review the script
4. Click Execute

Expected: User friendly error

Results:

Object reference not set to an instance of an object.
ERRORSHELPABOUT
System.NullReferenceException
Object reference not set to an instance of an object.

System.NullReferenceException: Object reference not set to an instance of an object.
at Mx.Administration.Services.CommandServices.HelpDeskCommandService.ExecuteUpdateScript(HelpDeskScriptExecuteRequest request)
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c_DisplayClass10.<GetExecutor>b_9(Object instance, Object[] methodParameters)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()