Indico will be down for maintenance starting at 6:30PM CST on Dec 12th 2023. Most Indico features will be available starting at 8:00CST. Registration for events involving Site Access and Badging will not be available until 10:30PM CST.
Either click "join" from
https://indico.cern.ch/event/779545/ (! not the same as the agenda!)
or use the direct link