The WorldMap Panel misses the map background

Grafana version: Grafana v5.1.4
Datasource:Elasticsearch 7.0 create datasource successed
The panel showes the data circle normal but misses the map background.
I don’t known what’s wrong about it ,Please help me.

The configure showed following
%E5%9B%BE%E7%89%8711|690x305


%E5%9B%BE%E7%89%8733