Hello,
I am trying to create a new source from the Grafana dashboard. Whenever, I click on the new source button, I get a black screen with no controls. An error gets thrown in the console as per the screenshot. I am using version 6.3.6
What do you mean by “new source”? You don’t create data sources from the dashboards, so I do not know what you’re trying to say.
Also, I recommend you try upgrading to the current version of Grafana to see if that helps.