The input study file for this analysis contains part elements (up to 20 listed) which have no flow path to a polymer injection location. Flow path here means a sequence of nodes joined by part elements. The absence of a flow path means that these elements cannot fill. This is presumed to be unintentional so analysis has been stopped.
Examine the elements in the GUI. Use Modeling Query Entities to locate the elements. It may be that the elements have been designated as 'part' instead of 'insert'. If so, correct the properties of these elements and resubmit the analysis. Another possibility is that a multi-cavity part has been meshed but no runner system has been connected to one or more of these cavities. If the elements are not required, delete and then run Mesh Mesh Tool Nodal Tools Purge Nodes to remove any associated nodes that are no longer required.