Dont use this too much but seems that the geoip map in ntop no longer works. Made sure that the Geo databases are in /usr/local/share/ntopng/httpdocs/geoip but still nothing. I see that pfsense has a patch for this in recent versions. Im running latest 19.7.5_5 tried on 2 boxes both with same results.
Did you execute this script referenced in some other posts here?