Arena Single Round Matches (SRMs) were unavailable earlier today due to a data configuration problem with the team chat room setup. Once we identified this and removed the room in question, the Arena became operational again. We are working on a much improved web-based SRM match administration wizard which will help us avoid data validation errors like this in the future. However, we sincerely sorry for the impact on our data science community today during this outage and will try our best to minimize future disruptions.