continuous sync error

My zotero on Firefox contiously shows the error msg while syncing. The error ID is 261815330. I've upgraded the space of storage up to 1G, but still can't complete the sync process every time.
  • dstillman Zotero Team
    Hash not found in HEAD response in Zotero.Sync.Storage.Session.ZFS._getStorageFileInfo()
    This indicates a problem with either your computer or your network—security software, proxy server, VPN, etc. Try restarting your computer, try disabling any security/firewall software you're using, try from a different network if this is a laptop...

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