What are the Symptoms of QuickBooks Error 9999?

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If you’re getting QuickBooks error 9999, try these steps:

• Check that your device is connected to the internet and try
  again.
• Make sure your device isn’t using a proxy server or VPN.
• If you have a firewall, check that it’s not blocking QuickBooks
  from connecting to the internet.
• Try restarting QuickBooks and then retrying the connection process.