WTRL Time Trial - Zwift App on MAC Crashed before start

I was in the starting pen waiting for our start time yesterday (1819) for the 1800 WTRL Time Trial yesterday. The Zwift app on my MAC crashed at around 1805 and when I re-logged in it would not let me back into the pen.
Surely if I have already registered previously it should let me back in?
Any reason for the crash yesterday? I had run the update before the event.

Ian Chicken