For a quick overview, the QuickBooks connection has been lost error occurs due to an unstable network connection. The easiest way to fix it is by running the File Doctor Tool from the QuickBooks Tool Hub. For detailed information, read the linked blog or contact the certified QuickBooks expert’s team by calling us on our helpline number +1-800-579-9430. https://wakelet.com/wake/LzPz1C9VyHeNE-pybYXAd