The response of the endpoint /json should change according to the environment variable MESSAGE_STYLE Issue is not solved #Bug Of Freecodecamp

Tell us what’s happening:
I am working on the " Basic Node and Express - Use the .env File" exercise I tried my code also tried codes from the Forum as well nobody solutions is working also tried from youtube videos of Florin Pop here is link of his solutions :"
Conquering freeCodeCamp - Basic Node and Express - Live Stream #42

Test cases is not passed showing me error like this :

Your code so far
My code is:

  const message = (process.env.MESSAGE_STYLE ===  'uppercase') ? 'HELLO JSON' : 'Hello json';

Your browser information:

User Agent is: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0.

Challenge: Use the .env File

Link to the challenge: