Seadrive not sync

Seadrive 2 on Windows 10.

Got a message at “All libraries are loaded and ready to use”, but the new files, folders from local are not syncing to the server. On the local machine, it shows syn icon in status. The folders are not in the server either, when I checked with web version.

How to force sync?

The is no force sync option.

Check the client’s log files.