Hi Jimmie;
In spite of the "no score", maxcdn is detected; if you click on the cross you'll see:
j9nlm11j5h729y3zq2qyplk111i.wpengine.netdna-cdn.com : NetDNA
The low "cache static content" score is entirely due to external resources (e.g. Google Ads and Google Fonts) not specifying a max-age or expires.
hope this helps,
frank