Smokeping integration show no graph

Hi, i followed the smokeping integration, smokeping is working fine, all graphs have data and the image with smoke are generated ok.
In librenms device details, i see a ping link but it does not show anything, just a link to de device, i e,

Average

Aggregate

172.16.0.2 (this is a link)

If i copy and paste in a doc page the three items, there are some links like this
http://10.10.5.11:8181/graphs/type=smokeping_in/device=20/src=17/from=1551279000/

If i copy in the browser that link there is not any graphs there, i dont get any error in the page.