ID:11913 Can't display <name> netlist -- top-level design entity is encrypted or does not contain lower-level nodes

CAUSE: You attempted to open the specified viewer, but the netlist for the design does not contain any information. This error occurs when the top-level design entity is encrypted or does not contain any lower-level nodes. The Quartus Prime software cannot display empty or encrypted netlists.

ACTION: Ensure that the top-level design entity is encrypted or does not contain any lower-level nodes. If the top-level design entity is encrypted or does not contain any lower-level nodes, no action is required. If the top-level design entity is not encrypted, perform Analysis & Synthesis, and then open the specified viewer.