TypeError: Cannot read property 'env' of undefined

Hello there,

As far as I can tell, it appears you are using the old boilerplate code (from last year) to complete this. This might not be causing any issue with the tests, but it is recommended to use the latest boilerplate, as the tests rely on it.

Otherwise, walk me through what you think this code is doing:

if (process.env.MESSAGE_STYLE === "uppercase") {
  message = "Hello json".toUpperCase();
  res.json({
  "message": "Hello json".toUpperCase()
  });
} else {
  message = "Hello json";
}

Also, I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).