It says you should prepare for the debate with sources and that the next round will start in 1.5 hours... but no topic is given and when I click guest access I

It says you should prepare for the debate with sources and that the next round will start in 1.5 hours... but no topic is given and when I click guest access I get a message saying that dinner is already over. The last tweet is from a few weeks ago, no topic announced there either to gauge whether I'm interested in the first place. Not sure how I should get involved other than showing up unprepared and seeing if anything is going on.