Well ain't this a son of a gun of an unfortunate situation.
While we were testing the latest build of the beta we encountered an unforeseen and severe progression-blocking issue. We don't want to disappoint y'all with a beta that doesn't work properly, so we've made the tough call to delay the opening of the beta branch until the issue is fixed.
On the bright side, we have identified the problem and are working on a fix right now. We're aiming to have the beta branch up and running some time tomorrow (CEST time zone), but we first want to make sure that the build is stable. We'll make an announcement post when the beta branch goes live, so you won't miss it!
We're just as hyped for the start of the beta as y'all and we're working as hard as we can to get it in your hands. Thank you for your patience!