Operation: I made a mistake and need to STOP registrationsYou have just discovered that you have a flaw in your event set up.
You want to temporarily suspend offering your event while you fix the flaw / error.
The easiest way to do this is to change the status to Closed using the Event Home screen:
Once you have corrected your form, set the status back to Open.
While the event is Closed, your attendee prospects will see this screen: