I rebooted the machine, but I still get the same behavior:
[ 205.387148] Started bpfilter
[ 212.099631] connection1:0: ping timeout of 5 secs expired, recv timeout 5, last rx 4294942687, las
t ping 4294944000, now 4294945280
[ 212.102557] connection1:0: detected conn error (1022)
[ 214.218000] audit: type=1400 audit(1692972668.819:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/dhcpd" pid=2432 comm="apparmor_parser"
[ 300.919245] audit: type=1400 audit(1692972755.523:3): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=2632 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 321.153665] audit: type=1400 audit(1692972775.755:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/named" pid=2937 comm="apparmor_parser"
[ 321.427332] audit: type=1400 audit(1692972776.027:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/mysqld" pid=2952 comm="apparmor_parser"
[ 344.241868] audit: type=1400 audit(1692972798.843:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/ntpd" pid=3650 comm="apparmor_parser"
[ 400.410911] sogod[5255]: segfault at 7fff818e92db ip 00007faf60c467e4 sp 00007fff018e91e8 error 4 in libc-2.31.so[7faf60add000+178000]
[ 400.410926] Code: 7f 07 c5 fe 7f 4f 20 c5 fe 7f 54 17 e0 c5 fe 7f 5c 17 c0 c5 f8 77 c3 48 39 f7 0f 87 ab 00 00 00 0f 84 e5 fe ff ff c5 fe 6f 26 <c5> fe 6f 6c 16 e0 c5 fe 6f 74 16 c0 c5 fe 6f 7c 16 a0 c5 7e 6f 44
[ 400.410933] sogod[5253]: segfault at 7fff818e92db ip 00007faf60c467e4 sp 00007fff018e91e8 error 4 in libc-2.31.so[7faf60add000+178000]
[ 400.410947] Code: 7f 07 c5 fe 7f 4f 20 c5 fe 7f 54 17 e0 c5 fe 7f 5c 17 c0 c5 f8 77 c3 48 39 f7 0f 87 ab 00 00 00 0f 84 e5 fe ff ff c5 fe 6f 26 <c5> fe 6f 6c 16 e0 c5 fe 6f 74 16 c0 c5 fe 6f 7c 16 a0 c5 7e 6f 44
[ 400.411028] sogod[5254]: segfault at 7fff818e92db ip 00007faf60c467e4 sp 00007fff018e91e8 error 4 in libc-2.31.so[7faf60add000+178000]
[ 400.411042] Code: 7f 07 c5 fe 7f 4f 20 c5 fe 7f 54 17 e0 c5 fe 7f 5c 17 c0 c5 f8 77 c3 48 39 f7 0f 87 ab 00 00 00 0f 84 e5 fe ff ff c5 fe 6f 26 <c5> fe 6f 6c 16 e0 c5 fe 6f 74 16 c0 c5 fe 6f 7c 16 a0 c5 7e 6f 44
[ 707.809814] EXT4-fs (dm-8): mounted filesystem with ordered data mode. Opts: acl,user_xattr
[ 765.096447] audit: type=1400 audit(1692973219.699:7): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=6260 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 1668.566356] audit: type=1400 audit(1692974123.171:
: apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=18771 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7039.381859] audit: type=1400 audit(1692979493.983:9): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=20984 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7040.419653] audit: type=1400 audit(1692979495.023:10): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=20985 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7041.422151] audit: type=1400 audit(1692979496.027:11): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=20986 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7042.414717] audit: type=1400 audit(1692979497.015:12): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=20987 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7043.427204] audit: type=1400 audit(1692979498.027:13): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=20988 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7231.094707] audit: type=1400 audit(1692979685.699:14): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=21062 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[ 7289.769290] audit: type=1400 audit(1692979744.371:15): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=21090 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[10146.996704] audit: type=1400 audit(1692982601.595:16): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=22307 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[14937.886822] audit: type=1400 audit(1692987392.487:17): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24310 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15767.063484] audit: type=1400 audit(1692988221.663:18): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24708 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15768.064953] audit: type=1400 audit(1692988222.663:19): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24709 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15769.066888] audit: type=1400 audit(1692988223.667:20): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24710 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15770.067793] audit: type=1400 audit(1692988224.667:21): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24711 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15771.069052] audit: type=1400 audit(1692988225.667:22): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24712 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[15946.284417] audit: type=1400 audit(1692988400.883:23): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=24787 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[16442.274017] audit: type=1400 audit(1692988896.875:24): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25087 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[16446.196853] audit: type=1400 audit(1692988900.799:25): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25088 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[16546.312688] audit: type=1400 audit(1692989000.915:26): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25128 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[17414.625908] audit: type=1400 audit(1692989869.227:27): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25483 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[17419.567993] audit: type=1400 audit(1692989874.167:28): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25496 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[17595.015236] audit: type=1400 audit(1692990049.615:29): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=25612 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[20975.700873] audit: type=1400 audit(1692993430.303:30): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=27106 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[20976.701781] audit: type=1400 audit(1692993431.303:31): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=27107 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[21025.601714] audit: type=1400 audit(1692993480.203:32): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=27132 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[25892.114173] audit: type=1400 audit(1692998346.715:33): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=29217 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[26124.559461] audit: type=1400 audit(1692998579.159:34): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=29320 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[29041.368547] audit: type=1400 audit(1693001495.967:35): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=31829 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[37138.930362] audit: type=1400 audit(1693009593.531:36): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=36036 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[38033.442717] audit: type=1400 audit(1693010488.040:37): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=36423 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[51795.451790] audit: type=1400 audit(1693024250.052:38): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=42002 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[53130.510300] audit: type=1400 audit(1693025585.108:39): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=42628 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[55530.879525] audit: type=1400 audit(1693027985.476:40): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=43600 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[55909.949616] audit: type=1400 audit(1693028364.548:41): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=43814 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[57516.465246] audit: type=1400 audit(1693029971.064:42): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44518 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58491.422728] audit: type=1400 audit(1693030946.020:44): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44919 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58492.399881] audit: type=1400 audit(1693030946.996:45): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44920 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58493.435224] audit: type=1400 audit(1693030948.032:46): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44921 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58494.398532] audit: type=1400 audit(1693030948.996:47): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44922 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58495.429762] audit: type=1400 audit(1693030950.028:48): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44923 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58496.401709] audit: type=1400 audit(1693030951.000:49): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44924 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58497.404260] audit: type=1400 audit(1693030952.000:50): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44925 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58498.423314] audit: type=1400 audit(1693030953.020:51): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44926 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[58499.419863] audit: type=1400 audit(1693030954.016:52): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=44927 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[.....same until......]
[67750.864438] audit: type=1400 audit(1693040205.460:80): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=49295 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[67834.422880] audit: type=1400 audit(1693040289.020:81): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=49332 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[67835.423791] audit: type=1400 audit(1693040290.020:82): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=49333 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[75158.017493] audit: type=1400 audit(1693047612.612:83): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=52385 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[75237.171222] audit: type=1400 audit(1693047691.764:84): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=52423 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[76412.004965] audit: type=1400 audit(1693048866.600:85): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=52987 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[76417.005902] audit: type=1400 audit(1693048871.600:86): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=53005 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[76885.280483] audit: type=1400 audit(1693049339.876:87): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=53178 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[77194.140195] audit: type=1400 audit(1693049648.736:88): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=53363 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
[77197.387597] audit: type=1400 audit(1693049651.980:89): apparmor="DENIED" operation="exec" profile="/usr/sbin/dhcpd" name="/usr/share/zentyal-dhcp/dhcp-dyndns.sh" pid=53364 comm="isc-worker0000" requested_mask="x" denied_mask="x" fsuid=116 ouid=0
Please tell me what to do.