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#10885·syncthing

Does not run anymore on Windows 11

Author: haldi4803Created Sep 15, 2026Updated Sep 15, 2026
Labelsbugneeds-triage

What happened?

Not sure what exactly changed. But it does not start anymore.

Syncthing version

V2.1.5

Platform & operating system

Windows 11

Browser version

No response

Relevant log output

2026-09-09 08:05:50 INF syncthing v2.1.5 "Hafnium Hornet" (go1.27.1 windows-amd64) [email protected] 2026-09-08 06:57:55 UTC (log.pkg=main)
2026-09-09 08:05:50 INF Calculated our device ID (device=3FEXAX3-MOJR3HX-4BMXJ5R-36BDXP2-CYYJEAK-DN7TNKM-T7CSIUV-W5OKSQ4 log.pkg=syncthing)
2026-09-09 08:05:50 INF Detected upgrade (from=v2.1.3 to=v2.1.5 log.pkg=syncthing)
2026-09-09 08:05:50 INF Overall rate limit in use (send="is unlimited" recv="is unlimited" log.pkg=connections)
2026-09-09 08:05:50 INF Relay listener starting (id=dynamic+https://relays.syncthing.net/endpoint log.pkg=connections)
2026-09-09 08:05:50 INF Using discovery mechanism (identity="global discovery server https://discovery-lookup.syncthing.net/v2/?noannounce" log.pkg=discover)
2026-09-09 08:05:50 INF Using discovery mechanism (identity="global discovery server https://discovery-announce-v4.syncthing.net/v2/?nolookup" log.pkg=discover)
2026-09-09 08:05:50 INF Using discovery mechanism (identity="global discovery server https://discovery-announce-v6.syncthing.net/v2/?nolookup" log.pkg=discover)
2026-09-09 08:05:50 INF Using discovery mechanism (identity="IPv4 local broadcast discovery on port 21027" log.pkg=discover)
2026-09-09 08:05:50 INF Using discovery mechanism (identity="IPv6 local multicast discovery on address [ff12::8384]:21027" log.pkg=discover)
2026-09-09 08:05:50 INF Ready to synchronize (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive log.pkg=model)
2026-09-09 08:05:50 INF GUI and API listening (address=127.0.0.1:8384 log.pkg=api)
2026-09-09 08:05:50 INF Access the GUI via the following URL: http://127.0.0.1:8384/ (log.pkg=api)
2026-09-09 08:05:50 INF Loaded configuration (name=NB-Fabian log.pkg=syncthing)
2026-09-09 08:05:50 INF Loaded peer device configuration (device=QUUDMEX name=Laser address="[dynamic]" log.pkg=syncthing)
2026-09-09 08:05:50 INF Loaded peer device configuration (device=YUG5EII name="Roman PC" address="[dynamic]" log.pkg=syncthing)
2026-09-09 08:05:50 INF QUIC listener starting (address="[::]:22000" log.pkg=connections)
2026-09-09 08:05:50 INF TCP listener starting (address="[::]:22000" log.pkg=connections)
2026-09-09 08:05:51 INF Completed initial scan (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive log.pkg=model)
2026-09-09 08:05:51 INF Measured hashing performance (perf="403.29 MB/s" log.pkg=syncthing)
2026-09-09 08:05:59 INF Joined relay (uri=relay://193.5.17.149:3306 log.pkg=relay/client)
2026-09-09 08:06:00 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:00 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:00 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:00 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:01 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:01 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:01 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:01 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:11 INF Detected NAT services (count=0 log.pkg=nat)
2026-09-09 08:06:19 INF Detected NAT type (uri=quic://0.0.0.0:22000 type="Port restricted NAT" log.pkg=connections)
2026-09-09 08:06:19 INF Resolved external address (uri=quic://0.0.0.0:22000 address=quic://83.77.231.178:1366 via=stun.voipstunt.com:3478 log.pkg=connections)
2026-09-09 08:06:21 INF Established secure connection (device=YUG5EII connection.local="[fe80::4bd0:ad9:c37d:15e5%Ethernet]:22000" connection.remote="[fe80::6d07:2706:c129:452%Ethernet]:22000" connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7T4LQ0BC8F9K1G22138402 log.pkg=connections)
2026-09-09 08:06:21 INF New device connection (device=YUG5EII address="[fe80::6d07:2706:c129:452%Ethernet]:22000" remote.name=pc-roman3 remote.client=syncthing remote.version=v2.1.5 log.pkg=model)
2026-09-09 08:06:21 INF Established secure connection (device=QUUDMEX connection.local=169.168.1.142:22000 connection.remote=169.168.1.176:22000 connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7T4QUVB3OU2MFLU0P18322 log.pkg=connections)
2026-09-09 08:06:21 INF New device connection (device=QUUDMEX address=169.168.1.176:22000 remote.name=Laser remote.client=syncthing remote.version=v2.1.5 log.pkg=model)
2026-09-09 08:06:21 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:21 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:21 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:21 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:21 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:21 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:21 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:06:21 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:06:22 WRN Unexpected folder ID in ClusterConfig; ensure that the folder exists and that this device is selected under "Share With" in the folder configuration. (folder.label=Laser folder.id=wyj9x-mf25w device=YUG5EII log.pkg=model)
2026-09-09 08:06:23 INF Created or updated directory (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive dir.name=09.9.2026 dir.permissions=0755 log.pkg=model)
2026-09-09 08:06:23 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=3mm_1stk_24172.DXF file.modified="2026-08-31 17:52:53.3022281 +0200 CEST" file.permissions=0644 file.size=18459 file.blocksize=131072 blocks.local=1 blocks.download=0 log.pkg=model)
2026-09-09 08:06:23 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=09.9.2026\10mm_1stk_23787.DXF file.modified="2026-06-16 05:39:37.5531695 +0200 CEST" file.permissions=0644 file.size=17228 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 08:06:26 INF Established secure connection (device=QUUDMEX connection.local=169.168.1.142:49171 connection.remote=169.168.1.176:22000 connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7TNV998HO4U97LI1J59L4K log.pkg=connections)
2026-09-09 08:06:26 INF Additional device connection (device=QUUDMEX address=169.168.1.176:22000 count=1 log.pkg=model)
2026-09-09 08:06:26 INF Established secure connection (device=YUG5EII connection.local=169.168.1.142:22000 connection.remote=169.168.1.134:22000 connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7TNQDDLQ81I88M6CF3GDSE log.pkg=connections)
2026-09-09 08:06:26 INF Additional device connection (device=YUG5EII address=169.168.1.134:22000 count=1 log.pkg=model)
2026-09-09 08:06:31 INF Established secure connection (device=YUG5EII connection.local="[fe80::4bd0:ad9:c37d:15e5%Ethernet]:49177" connection.remote="[fe80::6d07:2706:c129:452%Ethernet]:22000" connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7UATU2G20E15Q6KV7S3PEQ log.pkg=connections)
2026-09-09 08:06:31 INF Additional device connection (device=YUG5EII address="[fe80::6d07:2706:c129:452%Ethernet]:22000" count=2 log.pkg=model)
2026-09-09 08:06:31 INF Established secure connection (device=QUUDMEX connection.local=169.168.1.142:49176 connection.remote=169.168.1.176:22000 connection.type=tcp-client connection.lan=true connection.crypto=TLS1.3-TLS_AES_128_GCM_SHA256 connection.prio=10 connection.id=66JI7UB4A1R20TDVK3U3EG2SNG log.pkg=connections)
2026-09-09 08:06:31 INF Additional device connection (device=QUUDMEX address=169.168.1.176:22000 count=2 log.pkg=model)
2026-09-09 08:15:19 INF Resolved external address (uri=quic://0.0.0.0:22000 address=quic://83.77.231.178:22000 via=stun.voipstunt.com:3478 log.pkg=connections)
2026-09-09 08:36:41 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:36:41 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:36:41 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:36:41 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:36:41 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:36:41 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:36:41 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 08:36:41 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\20mm_4stk_24161.DXF" file.modified="2026-09-01 09:48:52.8501849 +0200 CEST" file.permissions=0644 file.size=17769 file.blocksize=131072 from=02.9.2026\20mm_4stk_24161.DXF log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm Inox 1 Stk. Grünmachen.dxf" file.modified="2026-09-02 20:06:47 +0200 CEST" file.permissions=0644 file.size=270011 file.blocksize=131072 from="02.9.2026\\5mm Inox 1 Stk. Grünmachen.dxf" log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm Inox  4Stk. Grünmachen 2.dxf" file.modified="2026-09-02 20:09:57 +0200 CEST" file.permissions=0644 file.size=269481 file.blocksize=131072 from="02.9.2026\\5mm Inox  4Stk. Grünmachen 2.dxf" log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm Inox 2 Stk. Grünmachen.dxf" file.modified="2026-09-02 20:06:06 +0200 CEST" file.permissions=0644 file.size=268311 file.blocksize=131072 from="02.9.2026\\5mm Inox 2 Stk. Grünmachen.dxf" log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm Inox 8 Stk. Grünmachen.dxf" file.modified="2026-09-02 20:11:42 +0200 CEST" file.permissions=0644 file.size=268658 file.blocksize=131072 from="02.9.2026\\5mm Inox 8 Stk. Grünmachen.dxf" log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm Inox 4 Stk Grünmachen 1.dxf" file.modified="2026-09-02 20:09:24 +0200 CEST" file.permissions=0644 file.size=268957 file.blocksize=131072 from="02.9.2026\\5mm Inox 4 Stk Grünmachen 1.dxf" log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\20mm_1stk_24153.DXF" file.modified="2026-08-27 14:48:31.6802725 +0200 CEST" file.permissions=0644 file.size=21146 file.blocksize=131072 from=02.9.2026\20mm_1stk_24153.DXF log.pkg=model)
2026-09-09 08:51:29 INF Renamed file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name="02.9.2026\\Neuer Ordner\\5mm_inox_2stk_24153.DXF" file.modified="2026-09-07 08:49:03.223092 +0200 CEST" file.permissions=0644 file.size=18786 file.blocksize=131072 from=02.9.2026\5mm_inox_2stk_24153.DXF log.pkg=model)
2026-09-09 09:07:01 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:07:01 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:07:01 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:07:01 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:07:01 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:07:01 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:07:02 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:07:02 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:37:22 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:37:22 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:37:22 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:37:22 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:37:22 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:37:22 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 09:37:22 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 09:37:22 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:07:42 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:07:42 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:07:42 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:07:42 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:07:42 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:07:42 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:07:42 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:07:42 WRN Failed to parse UPnP response (error="[http://169.168.1.138:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:27:51 INF Created or updated directory (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive dir.name=9.9.2026 dir.permissions=0755 log.pkg=model)
2026-09-09 10:27:51 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=9.9.2026\15mm_4stk_24217..DXF file.modified="2026-09-09 10:24:59.4298356 +0200 CEST" file.permissions=0644 file.size=18363 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 10:27:51 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=9.9.2026\15mm_4Stk_24217.DXF file.modified="2026-09-09 10:23:18.4409685 +0200 CEST" file.permissions=0644 file.size=17989 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 10:28:01 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=9.9.2026\30mm_8_24218.DXF file.modified="2026-03-02 10:17:04.6811367 +0100 CET" file.permissions=0644 file.size=17346 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 10:28:01 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=9.9.2026\35mm_4stk_24218.DXF file.modified="2026-09-09 07:20:16.360817 +0200 CEST" file.permissions=0644 file.size=17623 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 10:35:01 INF Synced file (folder.label=Laser folder.id=wyj9x-mf25w folder.type=sendreceive file.name=9.9.2026\6mm_50Stk_24221.DXF file.modified="2026-09-09 10:33:47.168838 +0200 CEST" file.permissions=0644 file.size=63859 file.blocksize=131072 blocks.local=0 blocks.download=1 log.pkg=model)
2026-09-09 10:38:02 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:38:02 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:38:02 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:38:02 WRN Failed to parse UPnP response (error="[http://169.168.1.181:1901/description.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:38:04 WRN Failed to parse UPnP response (error="Get \"http://169.168.1.138:1400/rootDesc.xml\": dial tcp 169.168.1.138:1400: connectex: No connection could be made because the target machine actively refused it." log.pkg=upnp)
2026-09-09 10:38:04 WRN Got malformed InternetGatewayDevice description: no WANDevices specified (log.pkg=upnp)
2026-09-09 10:38:04 WRN Failed to parse UPnP response (error="[http://169.168.1.248:1400/rootDesc.xml] Malformed device description: no compatible service descriptions found." log.pkg=upnp)
2026-09-09 10:53:22 INF Synced file (folder.labe

Source: syncthing/syncthing

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