I am using cytoscape 3.8.1. I used the output from GSEA to vizualise the network in EnrichmentMap app. After that I tried Analyze network to know the node degree, closeness centrality etc. to identify hub genes. But when I run Analyse network it gives error as "network interpretation null". If I try the same with sample yeast network it works. Can anyone suggest what could be the reason for the error? Thank you.