A logon session doesn't exist in order to connect to a network resources.
Caused when a service running as Local System tries to access the network without proper credentials.
Set credentials for the service in order to connect to the network.
In PDQ Deploy Pro and PDQ Inventory Pro this can be done by setting the user name to a valid local administrator account using the Server Service preferences panel.
Otherwise, it can be done by setting the user for the service using the service.msc tool.