Popular Routes
That's usually caused by some sort of local browser/network issue, possibly an overloaded browser cache. If you Google the error message there's a lot of advice on this but I'd suggest clearing your browser's cache to see if this helps. If not, try disabling any browser extensions you have installed.
Getting this error with a lot of features on this site, incluiding viewing a route:
www.plotaroute.com didn’t send any data.