Trying to debug a troubling issue where a client definitely paid through EasyAppointments by clicking on the Pay Now with PayPal button, but the appointment wasn't booked in the system. We discovered an issue where the 'required' fields were not actually required with the button, and hacked a solution to 'hide' the button when they aren't filled out, but that still leaves the possibility that a timeout could have caused a disconnect. Are there log files we can consult? Payment is required, and it seems to work in most cases, but not all. Please advise.