Yuta73
Hello, sorry for the inconvenience.
Could you please share with us your logs? Logs will record some information that helps us further look into the problem.
You just need to go to SKYBOX's Global Settings, change the Logging Levels to "INFO", reproduce SMB Network Errors, click the BUG icon in the upper-right corner of Global Settings, and send us a bug report attached with logs(tick the "upload logs" box).