Need help with 'Basic Node and Express - Use the .env File' challenge

Tell us what’s happening:
I’ve read every post about this topic, but I still couldn’t figure out why my code can’t pass the test. I’ve changed the name of the project, remixed the project. I also submitted the url without ‘/json’.

I get the following response:
The response of the endpoint /json should change according to the environment variable MESSAGE_STYLE

Your code so far

Glitch live app:

Glitch code:!/proud-dull-barometer

Core code:

  app.get("/json", (req,res)=> {
  var message = "Hello json";
  if (process.env.MESSAGE_STYLE === "uppercase") {
    message = message.toUpperCase();
  res.json({"message": message});

.env setting:

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36.

Challenge: Use the .env File

Link to the challenge: