This generally happens for one of the following reasons;
The seconary node of a Cluster configuration is used for the Loftware Print Server service
In a Disaster Recovery or High Availability fail over situation, and backup or non-production licensed LPS is being used
The Loftware Print Server is functioning normally on the backup or non-production instance
The solution is to determine why the Primary Node of a Cluster, or the Production LPS is not running. Correct the issue, the stop the LPS on the Cluster's Secondary Node, or the Backup or Non-Production LPS, and start the LPS on the Cluster's Primary Node or the Production LPS.