What is QuickBooks Error 12002?

a small business owner was trying to update QuickBooks to the latest version to ensure compliance and access new features. However, an error message stating, “QuickBooks Error 12002” appeared on her system screen, preventing completion of the update. The error occurred because QuickBooks could not establish a stable internet connection, which made Lisa realize that her network settings were misconfigured, which had further blocked QuickBooks from accessing the server.