[API-users] Maps API returning nothing

Dear ALL,

I have been trying the Maps API (https://www.gbif.org/developer/maps), but when attempting to run one of the demos at https://api.gbif.org/v2/map/occurrence/density/%7Bz%7D/%7Bx%7D/%7By%7D@1x.pn...

I keep getting back an empty ("400") image. What may be the problem?

Thanks in advance for any assistance you can provide.

With warmest regards,