Hello, the problem is that Joomla disables Booking session. It is a very strange problem.
You can improve file components/com_booking/views/reservation/tmpl/default.php
rows 353 - 356:
if (JFactory::getApplication()->getUserState('com_booking.pay.' . $this->reservation->id)) {
JFactory::getApplication()->setUserState('com_booking.pay.' . $this->reservation->id, null); // pay online once only
include $payment->button;
}
improve as:
include $payment->button;
I have done the fix for Dingos via his FTP.