Same issue here. 1.4 folder syncs fine, 2.0 folder won't sync on my Synology. This is what was in my Synology log: [12:18:21] Can't open file /usr/local/bittorrentsync/var/webui/js/templates.js.gz with mode 0 permissions 666 - 2 No such file or directory[12:18:21] Can't open file /usr/local/bittorrentsync/var/webui/js/templates.js with mode 0 permissions 666 - 2 No such file or directory[12:18:21] Can't open file /usr/local/bittorrentsync/var/webui/js/templates.js.gz with mode 0 permissions 666 - 2 No such file or directory[12:18:21] Can't open file /usr/local/bittorrentsync/var/webui/js/templates.js with mode 0 permissions 666 - 2 No such file or directory[12:18:22] Can't open file /usr/local/bittorrentsync/var/webui/version.json.gz with mode 0 permissions 666 - 2 No such file or directory[12:18:22] Can't open file /usr/local/bittorrentsync/var/webui/version.json with mode 0 permissions 666 - 2 No such file or directory[12:18:22] assert failed /mnt/jenkins/workspace/Build-Sync-x64-glibc23/TunnelConnection.cpp:286[12:18:22] assert failed /mnt/jenkins/workspace/Build-Sync-x64-glibc23/TunnelConnection.cpp:286 I bought Pro, so I've submitted a support case. Initial response from support tech indicated he was clueless or didn't bother to actually read the initial logs I submitted. I have since submitted the debug logs from both my windows machine and the Synology, so I'm waiting for a response. The debug logs are a pile of undecipherable gibberish to me, but there appears to be some type of connection issue. [20150306 08:22:08.464] Incoming connection from 192.168.25.200:10823[20150306 08:22:08.464] SF[0DE5] [1796]: Received request "state_notify"[20150306 08:22:08.464] Incoming connection from 192.168.25.200:50355[20150306 08:22:08.464] assert failed /mnt/jenkins/workspace/Build-Sync-x64-glibc23/TunnelConnection.cpp:286[20150306 08:22:08.464] PD[F150] [1796]: Lost tunnel - id: 629, transport: TCP, status: "Connection has been closed by a peer", endpoint: 192.168.25.200:50355, encryption: TLS[20150306 08:22:08.465] Disconnect: Connection closed [20150303 21:14:19.196] Incoming connection from 192.168.25.216:27790[20150303 21:14:19.196] assert failed /mnt/jenkins/workspace/Build-Sync-x64-glibc23/TunnelConnection.cpp:286[20150303 21:14:19.196] Disconnect: Connection closed[20150303 21:14:19.196] Incoming connection from 192.168.25.200:10823[20150303 21:14:19.197] assert failed /mnt/jenkins/workspace/Build-Sync-x64-glibc23/TunnelConnection.cpp:286[20150303 21:14:19.197] Disconnect: Connection closed