As described in the user guide and repeated every time someone has this kind of problem: enter the boot loader and choose a previous state. You may then be able to retrieve logs to include in a ticket. And given the latest changes, you might be able to boot your current state disabling ACPI in the boot loader options.
Since last update tonight, it doesn’t boot anymore. It gets stuck after the “Plug-in card” icon becomes in color, the disk icon remains black&white and it never moves forward. Sadly my BIOS doesn’t allow disabling ACPI so I can’t try if it would make it boot.
Here I took a screenshot of the debug logs while booting, but I can’t see anything that seems like an error.