I've been using events booking for several months but over the past couple of weeks I've found that when I create a new event (in the same way as I use to) it's not showing the registration form, instead it just shows the 'full booked' / 'registration not available' text.
Sorry, I don't have any idea about it. Maybe something wrong with the settings? Could you please submit a support ticket sending us super admin account of your site and the link to the event so that I can check to see what's wrong and get it sorted ?