The Sundance Film Festival reported this afternoon that its box office had been briefly been shut down due by a cyberattack.

Site visitors were greeted with a message announcing the outage:

Sundance Film Festival has been subject to a cyberattack, causing network outages that has shut down our box office. No further information about the attack is available at this time, but our team is working hard to get our system back up and running as soon as possible. All screenings will still take place as planned. The show must go on and our artists’ voices will be heard. More information will be made available as we have it.

It’s not clear how many guests were affected by the outage. The attack appears to have left the festival’s box office closed for just under an hour before the system was brought back online.