The following information appears on the TRA website:

The Department of Education and Training will be undertaking a period of routine maintenance on its IT infrastructure between 8 pm Friday 10 May 2019 to midnight Sunday 12 May 2019 Australian Eastern Standard Time (AEST).

During this time, TRA IT services including the TRA online portal, TRA website, and email enquiry services will be unavailable.

Normal service will resume at the conclusion of this maintenance window.

Source: https://www.tradesrecognitionaustralia.gov.au/news-media/news/tra-it-systems-unavailable-due-routine-maintenance