LXD stopped working after update to 5.19

Hello,

after updating to v. 5.19 LXD stopped working.
Where there any breaking changes introduced in LXD 5.19?
I’ve already tried to run LXD recover but this doesn’t work.
Does the default.img file contains all necessary data to spin up a new instance of LXD from that?
Thanks for any help.

My System:

Distributor ID:	Debian
Description:	Debian GNU/Linux 11 (bullseye)
Release:	11
Codename:	bullseye
Linux srv 5.10.0-26-amd64 #1 SMP Debian 5.10.197-1 (2023-09-29) x86_64 GNU/Linux

Logs

time="2023-10-30T09:41:24+01:00" level=warning msg=" - Couldn't find the CGroup network priority controller, per-instance network priority will be ignored. Please use per-device limits.priority instead"
time="2023-10-30T09:41:24+01:00" level=warning msg="Instance type not operational" driver=qemu err="KVM support is missing (no /dev/kvm)" type=virtual-machine
time="2023-10-30T09:41:43+01:00" level=error msg="Failed mounting storage pool" err="Failed to mount \"/dev/loop8\" on \"/var/snap/lxd/common/lxd/storage-pools/default\" using \"btrfs\": invalid argument" pool=default
time="2023-10-30T09:41:44+01:00" level=warning msg="Failed to initialize fanotify, falling back on inotify" err="Failed to watch directory \"/dev\": no such device"
time="2023-10-30T09:42:59+01:00" level=error msg="Failed mounting storage pool" err="Failed to mount \"/dev/loop8\" on \"/var/snap/lxd/common/lxd/storage-pools/default\" using \"btrfs\": invalid argument" pool=default
time="2023-10-30T09:44:15+01:00" level=error msg="Failed mounting storage pool" err="Failed to mount \"/dev/loop8\" on \"/var/snap/lxd/common/lxd/storage-pools/default\" using \"btrfs\": invalid argument" pool=default

Storage

+---------+--------+--------------------------------------------+-------------+---------+-------------+
|  NAME   | DRIVER |                   SOURCE                   | DESCRIPTION | USED BY |    STATE    |
+---------+--------+--------------------------------------------+-------------+---------+-------------+
| default | btrfs  | /var/snap/lxd/common/lxd/disks/default.img |             | 45      | UNAVAILABLE |
+---------+--------+--------------------------------------------+-------------+---------+-------------+