Can you offer me some help to get rid of the QBDBMgrN Not running issue?

Since last evening, I have been trying to resolve the QBDBMgrN .exe Not Running Error but failed due to zero knowledge. Unfortunately, as a result of this, I was unable to work in a multi-user environment in QuickBooks. I searched the Intuit community forums but couldn’t find a satisfactory solution. The worst part about the Intuit help desk is that no expert answers the phone after several calls. I couldn’t get the point why the Intuit experts aren’t available at the moment when they are urgently required. So, please offer me some valuable tips to deal with this error.