This means Away Mode is active.
If you're a Sync user you can disable Away Mode from your Sync dashboard. Navigate to either the Overview or iTheme Security page and you'll see the setting to disable it. Note to reactivate it you'll need to adjust the setting when you're finished.
If you're not a Sync user to disable Away Mode you'll need to delete the itsec_away.config file via FTP or your hosting control panel. Navigate to wp-content > uploads > ithemes-security to find the file.