Error (-6094,0) on opening QuickBooks

When I tried to upgrade my antivirus software, I am receiving error on my QuickBooks software.
I could not open QuickBooks and when I am attempting to do so, I am receiving error stating,
Error: An error occurred when QuickBooks tried to start the database server that manages access to the QuickBooks company file. Error (-6094,0).
What should I do next?
