Hi Ryutaro,
Welcome to Box Community and glad to help!
Can we begin by verifying your current Box version and Operating System?
We'd love to further assist!
Hello, the sync issue was suddenly resolved.
Was there any issue at Box side? This sync issue happens every several months, actually. It resolves by itself in weeks, without us doing anything. What do you think causes this problem. We always have a hard time with this sync problem.