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"Error (org-babel): Error reading results: (end-of-file)" Running Example in literate2 Article

First, I just wanted to say that this is an excellent article on a topic that really speaks to me. I would love replace tools like Postman with org-mode and org-babel and have had issues tying it all together in the past.

I copied the first two REST-related source blocks from your article like so:

#+NAME: restclient
#+begin_src restclient :results value
POST http://httpbin.org/post
Content-Type: application/json

{
    "jql": "project = HSP",
    "startAt": 0,
    "maxResults": 15,
    "fields": [
        "summary",
        "status",
        "assignee"
    ]
}
#+end_src

#+begin_src sh :stdin restclient :wrap src json
jq -r .data
#+end_src

When I execute the first code block by itself I see output printed to the buffer, but when I run the second code block I get this warning with no additional output:

Error (org-babel): Error reading results: (end-of-file)

When I check my *Messages* buffer I see the following output:

executing Restclient code block (restclient)...
executing Restclient source code block
HTTP POST http://httpbin.org/post Headers:[((Content-Type . application/json))] Body:[{
    "jql": "project = HSP",
    "startAt": 0,
    "maxResults": 15,
    "fields": [
        "summary",
        "status",
        "assignee"
    ]
}]
Contacting host: httpbin.org:80
"{
  \"args\": {},
  \"data\": \"{\\n    \\\"jql\\\": \\\"project = HSP\\\",\\n    \\\"startAt\\\": 0,\\n    \\\"maxResults\\\": 15,\\n    \\\"fields\\\": [\\n        \\\"summary\\\",\\n        \\\"status\\\",\\n        \\\"assignee\\\"\\n    ]\\n}\",
  \"files\": {},
  \"form\": {},
  \"headers\": {
    \"Accept\": \"*/*\",
    \"Accept-Encoding\": \"gzip\",
    \"Content-Length\": \"149\",
    \"Content-Type\": \"application/json\",
    \"Extension\": \"Security/Digest Security/SSL\",
    \"Host\": \"httpbin.org\",
    \"Mime-Version\": \"1.0\",
    \"X-Amzn-Trace-Id\": \"Root=1-628d016f-3878cbe630d6c2f137b2f8e2\"
  },
  \"json\": {
    \"fields\": [
      \"summary\",
      \"status\",
      \"assignee\"
    ],
    \"jql\": \"project = HSP\",
    \"maxResults\": 15,
    \"startAt\": 0
  },
  \"origin\": \"192.70.191.1\",
  \"url\": \"http://httpbin.org/post\"
}
"
Code block produced no output.

So clearly some output is being generated but the second code block doesn't seem to be able to read it.

Is there a step that I'm missing?

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