Thread/Matter commissioning fails "mDNS broadcast failed" "network unreachable"

I tried to connect a Eve Energy matter device to Home Assistant using SkyConnect but the commissioning failed.

I used the HA compainion app and also tried smartthings app on Android. The OTBR connection succeed, I was able to see the child in OTBR topology.

The Matter Server log showed an error “network is unreachable”

2024-07-22 21:46:37.420 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] CHIP minimal mDNS configured as 'Operational device'; instance name: D6AAB6F0C0B04E9D-000000000001B669.
2024-07-22 21:46:37.422 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Warning: Attempt to mDNS broadcast failed on end0:  src/inet/UDPEndPointImplSockets.cpp:416: OS Error 0x02000065: Network is unreachable
2024-07-22 21:46:37.422 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] mDNS broadcast full failed in 1 separate send attempts.
2024-07-22 21:46:37.423 (Dummy-2) CHIP_ERROR [chip.native.DIS] Failed to advertise records: src/inet/UDPEndPointImplSockets.cpp:416: OS Error 0x02000065: Network is unreachable

It tried several eve devices, always the same issue.
IPv6 is enabled. I was able to move a thread device from Apple HomePod to Home Assistant but was never able to pair a Thread/Matter device with Home Assistant von RPi4 with SkyConnect.

Matter Server log

2024-07-22 21:46:37.121 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = ExampleOpCredsICAKey1, Value = 0x7febffdc40 (97)
2024-07-22 21:46:37.121 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 97

2024-07-22 21:46:37.124 (MainThread) INFO [chip.CertificateAuthority] Loading fabric admins from storage...
2024-07-22 21:46:37.125 (MainThread) INFO [chip.FabricAdmin] New FabricAdmin: FabricId: 0x0000000000000002, VendorId = 0x134B
2024-07-22 21:46:37.125 (MainThread) DEBUG [chip.storage] SetReplKey: caList = {'1': [{'fabricId': 2, 'vendorId': 4939}]}
2024-07-22 21:46:37.126 (MainThread) INFO [matter_server.server.stack] CHIP Controller Stack initialized.
2024-07-22 21:46:37.126 (MainThread) DEBUG [aiorun] Entering run()
2024-07-22 21:46:37.127 (MainThread) DEBUG [asyncio] Using selector: EpollSelector
2024-07-22 21:46:37.128 (MainThread) DEBUG [aiorun] Creating default executor
2024-07-22 21:46:37.129 (MainThread) INFO [matter_server.server.server] Starting the Matter Server...
[New Thread 0x7feb7fe1e0 (LWP 254)]
2024-07-22 21:46:37.140 (MainThread) INFO [matter_server.server.helpers.paa_certificates] Skip fetching certificates (already fetched within the last 24h).
2024-07-22 21:46:37.141 (MainThread) INFO [chip.FabricAdmin] Allocating new controller with CaIndex: 1, FabricId: 0x0000000000000002, NodeId: 0x000000000001B669, CatTags: []
2024-07-22 21:46:37.144 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Creating New Device Controller
2024-07-22 21:46:37.144 (Dummy-2) CHIP_PROGRESS [chip.native.CTL] Setting attestation nonce to random value
2024-07-22 21:46:37.145 (Dummy-2) CHIP_PROGRESS [chip.native.CTL] Setting CSR nonce to random value
2024-07-22 21:46:37.146 (Dummy-2) CHIP_PROGRESS [chip.native.SPT] Using device attestation PAA trust store path /data/credentials.
2024-07-22 21:46:37.355 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = ExampleCARootCert1, Value = 0x7fe000dca0 (600)
2024-07-22 21:46:37.356 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 411

2024-07-22 21:46:37.356 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = ExampleCAIntermediateCert1, Value = 0x7fe000da40 (600)
2024-07-22 21:46:37.357 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 410

2024-07-22 21:46:37.357 (Dummy-2) CHIP_PROGRESS [chip.native.CTL] Generating NOC
2024-07-22 21:46:37.364 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = f/1/r, Value = 0x7febffcef8 (400)
2024-07-22 21:46:37.365 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 231

2024-07-22 21:46:37.365 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = f/1/n, Value = 0x7febffcef8 (400)
2024-07-22 21:46:37.366 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 244

2024-07-22 21:46:37.366 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = f/1/r, Value = 0x7fe0005360 (400)
2024-07-22 21:46:37.367 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 231

2024-07-22 21:46:37.367 (Dummy-2) CHIP_PROGRESS [chip.native.FP] Validating NOC chain
2024-07-22 21:46:37.394 (Dummy-2) CHIP_PROGRESS [chip.native.FP] NOC chain validation successful
2024-07-22 21:46:37.395 (Dummy-2) CHIP_PROGRESS [chip.native.FP] Updated fabric at index: 0x1, Node ID: 0x000000000001B669
2024-07-22 21:46:37.395 (Dummy-2) CHIP_PROGRESS [chip.native.TS] Last Known Good Time: 2023-10-14T01:16:48
2024-07-22 21:46:37.395 (Dummy-2) CHIP_PROGRESS [chip.native.TS] New proposed Last Known Good Time: 2021-01-01T00:00:00
2024-07-22 21:46:37.396 (Dummy-2) CHIP_PROGRESS [chip.native.TS] Retaining current Last Known Good Time
2024-07-22 21:46:37.396 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = g/sri, Value = 0x7febffc840 (966)
2024-07-22 21:46:37.396 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Not Found

2024-07-22 21:46:37.396 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = g/fs/c, Value = 0x7febffd0d0 (7)
2024-07-22 21:46:37.396 (Dummy-2) DEBUG [chip.storage] SetSdkKey: g/fs/c = b'\x15$\x00\x01(\x01\x18'
2024-07-22 21:46:37.397 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = f/1/m, Value = 0x7febffd048 (9)
2024-07-22 21:46:37.399 (Dummy-2) DEBUG [chip.storage] SetSdkKey: f/1/m = b'\x15%\x00K\x13,\x01\x00\x18'
2024-07-22 21:46:37.400 (Dummy-2) CHIP_PROGRESS [chip.native.FP] Metadata for Fabric 0x1 persisted to storage.
2024-07-22 21:46:37.401 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = f/1/n, Value = 0x7fe000e7f0 (244)
2024-07-22 21:46:37.402 (Dummy-2) DEBUG [chip.storage] SetSdkKey: f/1/n = b'\x150\x01\x01\x01$\x02\x017\x03$\x13\x02\x18&\x04\x80"\x81\'&\x05\x80%M:7\x06$\x15\x02&\x11i\xb6\x01\x00\x18$\x07\x01$\x08\x010\tA\x0488\x9e*\x976\x0f\xfe\xc3$\xef\x9b\xa32\xdf\x87\xd3\xee\xae|8\xbc\x92\xfb\xe1\xbb\xc3\xd5\xb2\xb3\x1a\x88\xee\xc9\x94\xa0\x1a\xa5{\xffn\xdeK\xb3_j\xc3{r\xa9\xd2\xa3\x1a\xa9\xe0\x13\x19\x9a\xa3\xb5\xe14\xe3{7\n5\x01(\x01\x18$\x02\x016\x03\x04\x02\x04\x01\x180\x04\x14.\x8e\xb0\x98\xee\xf5\x9c\xd3{l\xb1\xf4\x04T\xf7\xf4\xe16\xa1\xa70\x05\x14;\xe9\x0e=1Y+-\xbaE\xa6t\x18J\x9e\x94\xe0?\xed\xe8\x180\x0b@\xcd\x97\x903B\xadY\xcdE9d=qI{\xd8\xef\x13\xa5<\xc2\xbc\x8f\xa4Uc\xa4\xd9#\xd4\xea\xb3\xec\xed\x83\x04O1\xef\x17\xa1\xc0\xeem\xe8y\xd2}\xb6&\xe5\xec+\xb8 d(\x05Qz\x96\x14\x85\x89\x18'
2024-07-22 21:46:37.403 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = f/1/i, Value = 0x7fe0010ae0 (231)
2024-07-22 21:46:37.404 (Dummy-2) DEBUG [chip.storage] SetSdkKey: f/1/i = b'\x150\x01\x01\x01$\x02\x017\x03$\x14\x01\x18&\x04\x80"\x81\'&\x05\x80%M:7\x06$\x13\x02\x18$\x07\x01$\x08\x010\tA\x04\xacz\xb8|\xdf\x88\ro\xf2~!\xa3\xb85\xe5\xff\x1c\r\x80\xd2`\xfcY\xa0Z\xabpc\xc9\xef\xd1R\xbc\xc1Y\xac\x98 W\x96\xe9Rs\xcf\xcf}y\xfa\x9b1[<(\xcd\xfe\xdd\xe3\xa8wE\x17W\x9d\xa87\n5\x01)\x01\x18$\x02`0\x04\x14;\xe9\x0e=1Y+-\xbaE\xa6t\x18J\x9e\x94\xe0?\xed\xe80\x05\x14\xa6=|\xc2\xe2\x04\xbc\xdeo\xc2\xf09\x13(l"\xca\x1f\xb9A\x180\x0b@\xef\xbc(\xde\xf6\x92\x8e\xb21\x10\xa5{<\xe0};\x08~\x16S\x18b\x8fl\xe2[\n9.\xc3\xd1\xa2!5\nf\xdf*\xe6JDwY\n\tw>*BW\x92\xe9\xc2?\x90\xbb\xd4\x8al\x07d\x91\xb1\xe3\x18'
2024-07-22 21:46:37.405 (Dummy-2) CHIP_PROGRESS [chip.native.TS] Committing Last Known Good Time to storage: 2023-10-14T01:16:48
2024-07-22 21:46:37.405 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = g/lkgt, Value = 0x7febffd070 (8)
2024-07-22 21:46:37.406 (Dummy-2) DEBUG [chip.storage] SetSdkKey: g/lkgt = b'\x15&\x00\x80\xa8\xbc,\x18'
2024-07-22 21:46:37.406 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = g/fs/c, Value = 0x7febffd070 (0)
2024-07-22 21:46:37.407 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Buf not big enough

2024-07-22 21:46:37.407 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::DeleteKeyValue: Key = g/fs/c
2024-07-22 21:46:37.408 (Dummy-2) DEBUG [chip.storage] DeleteSdkKey: g/fs/c
2024-07-22 21:46:37.409 (Dummy-2) CHIP_PROGRESS [chip.native.CTL] Joined the fabric at index 1. Fabric ID is 0x0000000000000002 (Compressed Fabric ID: D6AAB6F0C0B04E9D)
2024-07-22 21:46:37.409 (Dummy-2) CHIP_PROGRESS [chip.native.CTL] *** Missing DeviceAttestationVerifier configuration at DeviceCommissioner init: using global default, consider passing one in CommissionerInitParams.
2024-07-22 21:46:37.409 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] Updating services using commissioning mode 0
2024-07-22 21:46:37.415 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] CHIP minimal mDNS started advertising.
2024-07-22 21:46:37.418 (Dummy-2) CHIP_DETAIL [chip.native.DL] Using WiFi MAC for hostname
2024-07-22 21:46:37.418 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] Advertise operational node D6AAB6F0C0B04E9D-000000000001B669
2024-07-22 21:46:37.419 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with _matter._tcp.local
2024-07-22 21:46:37.419 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with D6AAB6F0C0B04E9D-000000000001B669._matter._tcp.local
2024-07-22 21:46:37.419 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with D6AAB6F0C0B04E9D-000000000001B669._matter._tcp.local
2024-07-22 21:46:37.419 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with E45F018E7FE20000.local
2024-07-22 21:46:37.419 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with E45F018E7FE20000.local
2024-07-22 21:46:37.420 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Responding with _ID6AAB6F0C0B04E9D._sub._matter._tcp.local
2024-07-22 21:46:37.420 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] CHIP minimal mDNS configured as 'Operational device'; instance name: D6AAB6F0C0B04E9D-000000000001B669.
2024-07-22 21:46:37.422 (Dummy-2) CHIP_DETAIL [chip.native.DIS] Warning: Attempt to mDNS broadcast failed on end0:  src/inet/UDPEndPointImplSockets.cpp:416: OS Error 0x02000065: Network is unreachable
2024-07-22 21:46:37.422 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] mDNS broadcast full failed in 1 separate send attempts.
2024-07-22 21:46:37.423 (Dummy-2) CHIP_ERROR [chip.native.DIS] Failed to advertise records: src/inet/UDPEndPointImplSockets.cpp:416: OS Error 0x02000065: Network is unreachable
2024-07-22 21:46:37.440 (Dummy-2) CHIP_PROGRESS [chip.native.DIS] mDNS service published: _matter._tcp
2024-07-22 21:46:37.440 (Dummy-2) CHIP_PROGRESS [chip.native.SPT] Setting up group data for Fabric Index 1 with Compressed Fabric ID:
2024-07-22 21:46:37.440 (Dummy-2) CHIP_DETAIL [chip.native.SPT] 0xd6, 0xaa, 0xb6, 0xf0, 0xc0, 0xb0, 0x4e, 0x9d, 
2024-07-22 21:46:37.441 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = f/1/g, Value = 0x7febffd488 (128)
2024-07-22 21:46:37.441 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 23

2024-07-22 21:46:37.441 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::GetKeyValue: Key = f/1/k/0, Value = 0x7febffd528 (128)
2024-07-22 21:46:37.442 (Dummy-2) CHIP_DETAIL [chip.native.CTL] Key Found 97

2024-07-22 21:46:37.442 (Dummy-2) CHIP_DETAIL [chip.native.CTL] StorageAdapter::SetKeyValue: Key = f/1/k/0, Value = 0x7febffd528 (97)
2024-07-22 21:46:37.443 (Dummy-2) DEBUG [chip.storage] SetSdkKey: f/1/k/0 = b'\x15$\x01\x00$\x02\x016\x03\x15$\x04\x00%\x05\xcc\xee0\x06\x10\xae"a\xcf@\x02\xc0xu\xed\x1a\x1e`o\xc1\x16\x18\x15$\x04\x00$\x05\x000\x06\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x15$\x04\x00$\x05\x000\x06\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x18%\x07\xff\xff\x18'
2024-07-22 21:46:37.444 (Dummy-2) CHIP_ERROR [chip.native.DL] Long dispatch time: 301 ms, for event type 2
2024-07-22 21:46:37.448 (MainThread) DEBUG [matter_server.server.sdk] CHIP Device Controller Initialized
2024-07-22 21:46:37.460 (ThreadPoolExecutor-0_0) DEBUG [matter_server.server.storage] Loading persistent settings from /data/15468377015298576029.json
2024-07-22 21:46:37.465 (MainThread) DEBUG [matter_server.server.storage] Started.
2024-07-22 21:46:37.465 (MainThread) INFO [matter_server.server.device_controller] Loaded 0 nodes from stored configuration
2024-07-22 21:46:37.518 (MainThread) INFO [matter_server.server.vendor_info] Loading vendor info from storage.
2024-07-22 21:46:37.539 (MainThread) INFO [matter_server.server.vendor_info] Loaded 226 vendors from storage.
2024-07-22 21:46:37.539 (MainThread) INFO [matter_server.server.vendor_info] Fetching the latest vendor info from DCL.
2024-07-22 21:46:38.350 (MainThread) INFO [matter_server.server.vendor_info] Fetched 224 vendors from DCL.
2024-07-22 21:46:38.351 (MainThread) INFO [matter_server.server.vendor_info] Saving vendor info to storage.
2024-07-22 21:46:38.379 (MainThread) DEBUG [matter_server.server.server] Detected dashboard files on /usr/local/lib/python3.11/site-packages/matter_server/dashboard
2024-07-22 21:46:38.383 (MainThread) DEBUG [matter_server.server.server] Webserver initialized.
2024-07-22 21:47:14.397 (MainThread) DEBUG [matter_server.server.client_handler] [549488302800] Connected from 192.168.10.51
2024-07-22 21:48:38.384 (ThreadPoolExecutor-0_0) DEBUG [matter_server.server.storage] Saved data to persistent storage

Silicon labs multiprotocol log

otbr-agent[312]: 00:28:44.499 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:28:44.499 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:29:25.855 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:29:25.866 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:8295, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:29:25.866 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:29:25.866 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:29:27.580 [I] RoutingManager: Sent Neighbor Solicitation to fe80:0:0:0:cece:1eff:fe51:8326 - attempt:1/5
otbr-agent[312]: 00:29:27.584 [I] RoutingManager: Received NA from router fe80:0:0:0:cece:1eff:fe51:8326
otbr-agent[312]: 00:29:55.890 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:29:55.900 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:f0cf, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:29:55.900 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:29:55.901 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:30:15.004 [I] AnnounceSender: Schedule tx for one cycle
otbr-agent[312]: 00:30:15.288 [I] Mle-----------: Send Announce on channel 15
otbr-agent[312]: 00:30:15.300 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:62c8, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:30:15.300 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:30:15.301 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:30:18.131 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:30:18.143 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:2142, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:30:18.143 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:30:18.143 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:30:27.407 [I] RoutingManager: Sent Neighbor Solicitation to fe80:0:0:0:cece:1eff:fe51:8326 - attempt:1/5
otbr-agent[312]: 00:30:27.411 [I] RoutingManager: Received NA from router fe80:0:0:0:cece:1eff:fe51:8326
otbr-agent[312]: 00:30:37.169 [I] Mle-----------: Send Announce on channel 16
otbr-agent[312]: 00:30:37.181 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:36f8, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:30:37.181 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:30:37.181 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:30:58.625 [I] Mle-----------: Send Announce on channel 17
otbr-agent[312]: 00:30:58.638 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:9406, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:30:58.639 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:30:58.639 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:31:02.677 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:31:02.688 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:8766, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:31:02.688 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:31:02.688 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:31:20.497 [I] Mle-----------: Send Announce on channel 18
otbr-agent[312]: 00:31:20.508 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:7113, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:31:20.509 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:31:20.509 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:31:27.344 [I] RoutingManager: Sent Neighbor Solicitation to fe80:0:0:0:cece:1eff:fe51:8326 - attempt:1/5
otbr-agent[312]: 00:31:27.349 [I] RoutingManager: Received NA from router fe80:0:0:0:cece:1eff:fe51:8326
otbr-agent[312]: 00:31:29.766 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:31:29.778 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:18cb, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:31:29.778 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:31:29.778 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:31:42.063 [I] Mle-----------: Send Announce on channel 19
otbr-agent[312]: 00:31:42.075 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:b5f4, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:31:42.075 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:31:42.075 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:31:54.911 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:31:54.923 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:4fba, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:31:54.923 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:31:54.923 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:32:03.848 [I] Mle-----------: Send Announce on channel 20
otbr-agent[312]: 00:32:03.860 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:9905, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:32:03.861 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:32:03.861 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:32:24.888 [I] Mle-----------: Send Announce on channel 21
otbr-agent[312]: 00:32:24.901 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:22f4, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:32:24.902 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:32:24.902 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:32:27.126 [I] RoutingManager: Sent Neighbor Solicitation to fe80:0:0:0:cece:1eff:fe51:8326 - attempt:1/5
otbr-agent[312]: 00:32:27.138 [I] RoutingManager: Received NA from router fe80:0:0:0:cece:1eff:fe51:8326
otbr-agent[312]: 00:32:32.751 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:32:32.762 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:7687, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:32:32.762 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:32:32.762 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:32:44.440 [I] MlrManager----: MLR Reregister!
otbr-agent[312]: 00:32:46.618 [I] Mle-----------: Send Announce on channel 22
otbr-agent[312]: 00:32:46.631 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:6a80, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:32:46.632 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:32:46.632 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:33:00.785 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:33:00.795 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:74eb, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:33:00.796 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:33:00.796 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:33:08.084 [I] Mle-----------: Send Announce on channel 23
otbr-agent[312]: 00:33:08.097 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:7bc7, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:33:08.098 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:33:08.098 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:33:26.048 [I] RoutingManager: Sent Neighbor Solicitation to fe80:0:0:0:cece:1eff:fe51:8326 - attempt:1/5
otbr-agent[312]: 00:33:26.054 [I] RoutingManager: Received NA from router fe80:0:0:0:cece:1eff:fe51:8326
otbr-agent[312]: 00:33:28.539 [I] RoutingManager: Evaluating routing policy
otbr-agent[312]: 00:33:28.539 [I] RoutingManager: Preparing RA
otbr-agent[312]: 00:33:28.539 [I] RoutingManager: - RIO fd7d:f502:c86a:1::/64 (lifetime:1800, prf:medium)
otbr-agent[312]: 00:33:28.540 [I] RoutingManager: Sent RA on infra netif 3
otbr-agent[312]: 00:33:28.540 [I] RoutingManager: Will evaluate routing policy in 05:42.711 (342711 msec)
otbr-agent[312]: 00:33:28.540 [I] RoutingManager: Received RA from fe80:0:0:0:5d43:233e:4a65:ef6b on infra netif 3
otbr-agent[312]: 00:33:28.540 [I] RoutingManager: - RA Header - default route - lifetime:0
otbr-agent[312]: 00:33:29.324 [I] Mle-----------: Send Announce on channel 24
otbr-agent[312]: 00:33:29.336 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:d970, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:33:29.336 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:33:29.336 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:33:43.162 [I] Mle-----------: Send Advertisement (ff02:0:0:0:0:0:0:1)
otbr-agent[312]: 00:33:43.172 [I] MeshForwarder-: Sent IPv6 UDP msg, len:90, chksum:ec50, ecn:no, to:0xffff, sec:no, prio:net
otbr-agent[312]: 00:33:43.173 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:33:43.173 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788
otbr-agent[312]: 00:33:51.120 [I] Mle-----------: Send Announce on channel 25
otbr-agent[312]: 00:33:51.132 [I] MeshForwarder-: Sent IPv6 UDP msg, len:83, chksum:d966, ecn:no, to:0xffff, sec:yes, prio:net
otbr-agent[312]: 00:33:51.132 [I] MeshForwarder-:     src:[fe80:0:0:0:bc9d:9242:bf32:9178]:19788
otbr-agent[312]: 00:33:51.132 [I] MeshForwarder-:     dst:[ff02:0:0:0:0:0:0:1]:19788

What is your setup/what device are you running on?

Since the latest version, the Matter Server announces itself on the network. This error just means the Matter Server could not announce itself on one of the network interfaces. You probably have an unconnected Ethernet or WiFi interface on your host. But this should not be problematic per-se.

What error did you get?

There is currently a manual step you need to do to synchronize the Thread credentials. Please check Thread - Home Assistant.