Thanks for bringing this issue to our attention. I confirm that all our live sample applications are not working at the moment. We are working at solving this issue due to something we broke in the infrastructure supporting those demos.
You may want to get deeper in the product by following the intro videos at https://dgraph.io/docs/tutorials/ and by doing the Dgraph tour. The Tour is functional, and if you experience any issue with it, we will have a look at it.
For your specific question about Dgraph Tour for the step deploying a schema : yes, it is expecting you to run a local instance as shown in the previous step of the tutorial. I just verified the step on my instance.
We are actively working at improving the user experience and the learning path…