I’ve being doing your dgraph tour past 2 days. Great work  Several times during the tutorial, there were links to previous pages, but they all return 404.
 Several times during the tutorial, there were links to previous pages, but they all return 404.
Last example I saw is at a bigger dataset page, at the bottom of the page, there is reference to a previous page like this:
(or issue a schema query)
The link points to https://dgraph.io/basic/3, but this page doesn’t exist. I think you have added /tour/ in your endpoint, but forget to added it to links in tutorial, because this page does exist: https://dgraph.io/tour/basic/3.
I don’t remember the other places with 404 links, but if you search for links to previous tutorial pages, I’m sure you will see that they all miss /tour/ part. Returning 404 in the tutorial is bad for business, so I think you should look into it quickly 

 thank you for the quick response
 thank you for the quick response