The QuickBooks Database Server Manager is not installed or active on the machine in question, as indicated by the error message Qbdbmgrn Not Running On This Computer. This tool needs to be configured or reinstalled in order to function properly. It is crucial for controlling multiple users' access to QuickBooks company files. If you require immediate guidance and support, don't hesitate to call the QuickBooks Support Team at 1-855-856-0042.