@ntt56k4
I assume you are talking about the Demo Helpdesk App that you can get from the list of Apps when you go to 'Create App'?
If so, I've just opened the app and the code on the CREATE button is this:
Set(NumberOfTickets,NumberOfTickets + 1);
Patch(TicketList,Defaults(TicketList),{Id:NumberOfTickets,
Title:CreateTicketScreenTitleText.Text,
Priority: CreateTicketScreenPriorityDropDown.SelectedText.Value,
Author:MyProfile.Mail,
TaskStatus:"NOT STARTED",
PercentComplete: "0",
Created:Now(),
AssignedTO:"",
Description:CreateTicketScreenTaskDescription.Text,
Editor:MyProfile.Mail,
Modified:Now(),
Category:CreateTicketScreenCategoryDropDown.SelectedText.Value });
Reset(CreateTicketScreenTitleText);
Reset(CreateTicketScreenTaskDescription);
Reset(CreateTicketScreenCategoryDropDown);
Reset(CreateTicketScreenPriorityDropDown);
Navigate(ConfirmSubmitScreen,None)
This is totally different to your code. I suspect that someone has grabbed this app and made changes to it ie added a Form called CreateTicketForm and also added a Flow called HelpDeskFlow. You will need to speak to the person who did this to sort out the Flow issue.
If they are no longer working for your company then that's the most likely reason why the Flow is failing, but there are many other reasons.