deno example does not work for me

[dagda1]

I do not get the grapheql page after starting the server with this code:

import { serve } from 'https://deno.land/std@0.153.0/http/server.ts'
import { createServer } from 'https://cdn.skypack.dev/@graphql-yoga/common'

const graphQLServer = createServer({
  graphiql: {
    defaultQuery: /* GraphQL */ `
      query {
        hello
      }
    `,
  },
})

serve(graphQLServer, {
  addr: ':4000',
})

console.log('Server is running on http://localhost:4000/graphql')

When I access the url at http://localhost:4000/graphql, I do not get the graphiql UI.

[n1ru4l]

This has been resolved via #1667