getting domain info list: Cannot allocate memory

Does anybody know how to solved following problem?
I got following error when i ran `xl list' command:
$ sudo xl list
libxl: error: libxl_domain.c:335:libxl_list_domain: getting domain
info list: Cannot allocate memory
libxl_list_domain failed.

I am useing FreeBSD 13.2-RELEASE:
$ sysctl kern.version
kern.version: FreeBSD 13.2-RELEASE releng/13.2-n254617-525ecfdad597 GENERIC

Following processes are running:
$ ps ax | grep xen
  16  -  SL    0:00.00 [xenwatch]
  17  -  IL    0:00.00 [xenstore_rcv]
1195  -  I     0:00.00 /usr/local/sbin/xenstored --pid-file
/var/run/xen/xenstored.pid
1200  -  I     0:00.00 /usr/local/sbin/xenconsoled
1319  1  R+    0:00.00 grep xen
$ ps ax
 PID TT  STAT     TIME COMMAND
   0  -  DLs   0:00.13 [kernel]
   1  -  ILs   0:00.00 /sbin/init
   2  -  DL    0:00.00 [KTLS]
   3  -  DL    0:00.00 [crypto]
   4  -  DL    0:00.01 [cam]
   5  -  DL    0:00.01 [rand_harvestq]
   6  -  DL    0:00.00 [enc_daemon0]
   7  -  DL    0:00.02 [pagedaemon]
   8  -  DL    0:00.00 [vmdaemon]
   9  -  DL    0:00.00 [bufdaemon]
  10  -  DL    0:00.00 [audit]
  11  -  RNL  21:38.30 [idle]
  12  -  WL    0:02.12 [intr]
  13  -  DL    0:00.00 [geom]
  14  -  DL    0:00.00 [sequencer 00]
  15  -  DL    0:00.09 [usb]
  16  -  SL    0:00.00 [xenwatch]
  17  -  IL    0:00.00 [xenstore_rcv]
  18  -  DL    0:00.00 [vnlru]
  19  -  DL    0:00.00 [syncer]
 417  -  Is    0:00.00 dhclient: system.syslog (dhclient)
 420  -  Is    0:00.00 dhclient: bridge0 [priv] (dhclient)
 428  -  ICs   0:00.00 dhclient: bridge0 (dhclient)
 852  -  Is    0:00.00 dhclient: system.syslog (dhclient)
 855  -  Is    0:00.00 dhclient: em0 [priv] (dhclient)
 931  -  ICs   0:00.00 dhclient: em0 (dhclient)
 932  -  Is    0:00.00 /sbin/devd
1134  -  Ss    0:00.00 /usr/sbin/syslogd -s
1195  -  I     0:00.00 /usr/local/sbin/xenstored --pid-file
/var/run/xen/xenstored.pid
1197  -  DL    0:00.00 [balloon]
1200  -  I     0:00.00 /usr/local/sbin/xenconsoled
1231  -  Is    0:00.00 /usr/sbin/cron -s
1234  -  Ss    0:00.00 sendmail: accepting connections (sendmail)
1237  -  Is    0:00.00 sendmail: Queue runner@00:30:00 for
/var/spool/clientmqueue (sendmail)
1254  -  Is    0:00.00 sshd: /usr/sbin/sshd [listener] 0 of 10-100
startups (sshd)
1288  -  Is    0:00.01 sshd: asou [priv] (sshd)
1290  -  S     0:00.01 sshd: asou@pts/0 (sshd)
1296  -  Ss    0:00.02 tmux: server (/tmp/tmux-1001/default) (tmux)
1278 v0  Is+   0:00.00 /usr/libexec/getty Pc ttyv0
1279 v1  Is+   0:00.00 /usr/libexec/getty Pc ttyv1
1280 v2  Is+   0:00.00 /usr/libexec/getty Pc ttyv2
1281 v3  Is+   0:00.00 /usr/libexec/getty Pc ttyv3
1282 v4  Is+   0:00.00 /usr/libexec/getty Pc ttyv4
1283 v5  Is+   0:00.00 /usr/libexec/getty Pc ttyv5
1284 v6  Is+   0:00.00 /usr/libexec/getty Pc ttyv6
1285 v7  Is+   0:00.00 /usr/libexec/getty Pc ttyv7
1291  0  Is    0:00.00 -sh (sh)
1294  0  I+    0:00.00 tmux: client (/tmp/tmux-1001/default) (tmux)
1297  1  Ss    0:00.01 zsh -l
1320  1  R+    0:00.00 ps ax
--
ASOU Masato