I updated to LXD to 5.20-f3dd836 and it solve the problem of  "Certified Restricted". However, when I try to create a LXD vm I got another issue:

from rackd.log

2024-02-09 17:27:47 provisioningserver.rpc.pods: [critical] server4: Failed to compose machine: RequestedMachine(hostname='nasrin', architecture='amd64/generic', cores=4, memory=20480, block_devices=[RequestedMachineBlockDevice(size=195000000000, tags=['pool1'])], interfaces=[RequestedMachineInterface(ifname=None, attach_name=None, attach_type=None, attach_options=None, attach_vlan=None, requested_ips=[], ip_mode=None)], cpu_speed=None, known_host_interfaces=[], pinned_cores=[], hugepages_backed=False)
	Traceback (most recent call last):
	  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
	    self.run()
	  File "/usr/lib/python3.10/threading.py", line 953, in run
	    self._target(*self._args, **self._kwargs)
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/_threads/_threadworker.py", line 47, in work
	    task()
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/_threads/_team.py", line 182, in doWork
	    task()
	--- <exception caught here> ---
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 244, in inContext
	    result = inContext.theWork()  # type: ignore[attr-defined]
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 260, in <lambda>
	    inContext.theWork = lambda: context.call(  # type: ignore[attr-defined]
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/python/context.py", line 117, in callWithContext
	    return self.currentContext().callWithContext(ctx, func, *args, **kw)
	  File "/snap/maas/32469/usr/lib/python3/dist-packages/twisted/python/context.py", line 82, in callWithContext
	    return func(*args, **kw)
	  File "/snap/maas/32469/lib/python3.10/site-packages/provisioningserver/utils/twisted.py", line 203, in wrapper
	    result = func(*args, **kwargs)
	  File "/snap/maas/32469/lib/python3.10/site-packages/provisioningserver/drivers/pod/lxd.py", line 440, in compose
	    **self._get_machine_nics(request),
	  File "/snap/maas/32469/lib/python3.10/site-packages/provisioningserver/drivers/pod/lxd.py", line 526, in _get_machine_nics
	    raise LXDPodError("No host network to attach VM interfaces to")
	provisioningserver.drivers.pod.lxd.LXDPodError: No host network to attach VM interfaces to


Additional Info

lxc network ls
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
|   NAME   |   TYPE   | MANAGED |      IPV4      |           IPV6            | DESCRIPTION | USED BY |  STATE  |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| br-eno1  | bridge   | NO      |                |                           |             | 2       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| br-eno2  | bridge   | NO      |                |                           |             | 1       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| eno1     | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| eno2     | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| enp9s0f0 | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| enp9s0f1 | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| ibp8s0   | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| idrac    | physical | NO      |                |                           |             | 0       |         |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+
| lxdbr0   | bridge   | YES     | 10.152.74.1/24 | fd42:7ddd:6541:5f80::1/64 |             | 4       | CREATED |
+----------+----------+---------+----------------+---------------------------+-------------+---------+---------+

lxc storage ls
+---------+--------+------------------------------------------------+-------------+---------+---------+
|  NAME   | DRIVER |                     SOURCE                     | DESCRIPTION | USED BY |  STATE  |
+---------+--------+------------------------------------------------+-------------+---------+---------+
| default | dir    | /var/snap/lxd/common/lxd/storage-pools/default |             | 4       | CREATED |
+---------+--------+------------------------------------------------+-------------+---------+---------+
| pool1   | dir    | /mnt/gpu4/pool1/                               |             | 2       | CREATED |
+---------+--------+------------------------------------------------+-------------+---------+---------+

This is a machine was created 2 weeks ago (No track of LXD version) and is using the pool1.

 lxc ls
+-------+---------+-----------------------+------+-----------------+-----------+
| NAME  |  STATE  |         IPV4          | IPV6 |      TYPE       | SNAPSHOTS |
+-------+---------+-----------------------+------+-----------------+-----------+
| mpiw4 | RUNNING | 172.16.20.13 (enp5s0) |      | VIRTUAL-MACHINE | 0         |
|       |         | 10.96.52.48 (enp6s0)  |      |                 |           |
+-------+---------+-----------------------+------+-----------------+-----------+

Pls let me know if you need more info.

Thanks.