If you encounter a "Server Offline" error message while using the Updater, you can verify whether this is a client or server-side issue before submitting a support ticket.
Verify that you are using the latest version of ZIBO Updater by navigating to the ZIBO Updater website. Scroll to the bottom and find the "Software Info" section in the website footer. Verify that your software version (bottom right of the ZIBO Updater) matches the website.
If your version matches, navigate to http://status.ziboupdater.net, and verify that an incident or scheduled maintenance is not currently in progress. If the status monitor reports that everything is a-okay, please submit a support ticket, along with your log file. You can export your log file by following this article: https://embyte.freshdesk.com/support/solutions/articles/48001078122-how-to-export-your-log-file