Sorry I should have been clearer, don’t worry about the URL he pasted in, this was just a mistake as he had the wrong thing in his clipboard.
The important thing to note is just that you have to explicitly click on the “From Swagger File” tab first, and then you can paste in the original swagger file that you sent in the first post on here and it should work 
Here is the result using the code you sent in your first post:
