Basic Node and Express - Use the .env File [SUPPORT]

Hello guys! Can you guys help me with this challenge?

Been working on it a while and no success.
I stored the variable MESSAGE_STYLE in the .env file.

MESSAGE_STYLE=uppercase

then after in my App.js, i make the configuration requested

app.get('/json', function(req, res){
   if(process.env.MESSAGE_STYLE === 'uppercase'){
     res.json({"message":"HELLO JSON"});
   }
   else{
     res.json({"message":"Hello json"});
   } 
 });

but it keeps telling me this below:

Why did i do wrong?? Can you help me find out?? Thanks in advance!
This is the glitch lnk

Challenge: Use the .env File

Link to the challenge:

Hello there,

This is a known issue: Use the .env File Test Will Not Pass

Use the .env File will not pass

Basic Node and Express - Use the .env File get error Cannot set headers after they are sent to the client

Thank you! I used repl.it and it worked just fine!