Executing the nupkg and getting error RemoteException wrapping System.Runtime.InteropServices.COMException: We need to know who to send this to. Make sure you enter at least one name

I have developed a bot and delivered the nuget package to users.
The bot/nupkg works fine in my machine.
However it fails in the user machine with following error:

RemoteException wrapping System.Runtime.InteropServices.COMException: We need to know who to send this to. Make sure you enter at least one name.
RemoteException wrapping System.Runtime.InteropServices.COMException: We need to know who to send this to. Make sure you enter at least one name.
at UiPath.Mail.Activities.SendMailActivity.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)
at System.Activities.AsyncCodeActivity.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)
at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

@Mallika

Please check once mail part whether everything is proper or not.

What exactly you want me check? Can u please elaborate?
The same bot works in my machine, but its not working in the users.

@Mallika

Could you please help me with screenshot of that mail activity properties.


image