LXD VMs error

root@buneary:/home/ubuntu# lxc init --vm ubuntu:focal maas --profile maas_server_vm
Creating maas
root@buneary:/home/ubuntu# lxc config device override maas root size=50GB
Device root overridden for maas
root@buneary:/home/ubuntu# lxc start maas
Error: Failed to run: forklimits limit=memlock:unlimited:unlimited fd=3 -- /snap/lxd/22525/bin/qemu-system-x86_64 -S -name maas -uuid 8eefac31-8684-4c74-b38c-e157ce3039d6 -daemonize -cpu host -nographic -serial chardev:console -nodefaults -no-user-config -sandbox on,obsolete=deny,elevateprivileges=allow,spawn=deny,resourcecontrol=deny -readconfig /var/snap/lxd/common/lxd/logs/maas/qemu.conf -spice unix=on,disable-ticketing=on,addr=/var/snap/lxd/common/lxd/logs/maas/qemu.spice -pidfile /var/snap/lxd/common/lxd/logs/maas/qemu.pid -D /var/snap/lxd/common/lxd/logs/maas/qemu.log -smbios type=2,manufacturer=Canonical Ltd.,product=LXD -runas lxd: char device redirected to /dev/pts/0 (label console)
: Process exited with non-zero value 1
Try `lxc info --show-log maas` for more info
root@buneary:/home/ubuntu# lxc info --show-log maas
Name: maas
Status: STOPPED
Type: virtual-machine
Architecture: x86_64
Created: 2022/03/09 20:26 UTC

Log:

qemu-system-x86_64:/var/snap/lxd/common/lxd/logs/maas/qemu.conf:310: The device is not writable: Permission denied

root@buneary:/home/ubuntu# snap --version
snap    2.54.2+20.04ubuntu2
snapd   2.54.2+20.04ubuntu2
series  16
ubuntu  20.04
kernel  5.4.0-104-generic
root@buneary:/home/ubuntu# lxc --version
4.23
root@buneary:/home/ubuntu# qemu --version

Command 'qemu' not found, did you mean:

  command 'aqemu' from deb aqemu (0.9.2-2.3build1)

Try: apt install <deb name>

root@buneary:/home/ubuntu# qemu-
qemu-img                  qemu-make-debian-root     qemu-pr-helper            qemu-system-x86_64        
qemu-io                   qemu-nbd                  qemu-system-i386          qemu-system-x86_64-spice  
root@buneary:/home/ubuntu# qemu-system-x86_64 --version
QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.21)
Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers
root@buneary:/home/ubuntu# cat /etc/*release*
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.3 LTS"
NAME="Ubuntu"
VERSION="20.04.3 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.3 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
root@buneary:/home/ubuntu#