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Jenny Chen 9Jenny Chen 9 

Trailhead-Build an Account Geolocation App Project Error

This happened when i finished step "Use Events to Add Markers to the Map". When i tried to see it in Salesforce1 as "https://na16.lightning.force.com/one/one.app"

I got this error: 
Uncaught error in actionCallback : Cannot read property 'setParams' of null