Insight - CamelEvents: popup exception at page's load

Exception pops up when Insight - Camel Events page loads.

The exception message is different in Chrome and Firefox.

Chrome:
Uncaught TypeError: Cannot read property 'series' of null (http://localhost:8181/hawtio/insight/dashboard?kbnId=app%2Finsight%2Fdashboards%2Fcamel&p=insight&tab=insight-camel:11:69)

Firefox:
TypeError: t is null (http://localhost:8181/hawtio/app/app.js?6dc0975f91ad4cb5 line 1 > eval:11)