System broken after update to 2.246

I just did updates of my system from 2.201 via 2.224 to 2.246.
The first update worked well (after the mandatory ldconfig), the second completely broke the system.
It boots, but the volumio web interface does not come up.
I can ssh to the system and a “journalctl -f” spits out a
Aug 06 13:00:36 volumio volumio[1080]: Invalid card number.
This is repeated every second.
What shall I do?

I don’t know what the problem is, but maybe a clean flash is the fastest solution.

An update:

I did an strace on the volumio process and I get:

[pid 1536] open("/dev/snd/controlC5", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1536] open("/dev/aloadC5", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid 1536] write(2, “Invalid card number.\n”, 21) = 21

So the update seems to have broken ALSA. And actually:

root@volumio:~# aplay --list-devices
aplay: device_list:268: no soundcards found…

It would be usefuly to know which audio dac you use, if you did install custom stuff on your image etc .
give us more info as possible