This problem has now been fixed. If you are still having problems uploading attachments to appointments please contact the service offering the appointment.
-------
We are aware of a problem with the UniHub appointment system. Currently users are not able to upload attachments. For appointments where an attachment is required, the booking can not be completed.
Our system provider is investigating this as a matter of urgency. If you are trying to book an appointment for next week, please check back. If you are trying to book an appointment for Friday 7 January, please contact the service offering the appointment directly.