Help with error in // running tests

Tell us what’s happening:
I do not understand why it does not allow me to advance the system, when entering the link of my solution the following error appears:
// running tests
The response of the endpoint /json should change according to the environment variable MESSAGE_STYLE
// tests completed

I think I’m doing the right thing because my code works, I’ve even changed the code for these variants:
// Test 01

const mySecret = process.env['MESSAGE_STYLE']
var wordChange = "Hello json"

if (mySecret === "uppercase") {
   wordChange = wordChange.toUpperCase()
}
app.get("/json", (req, res) => {
   res.json({
       "message": wordChange
   })
})

// Test 02

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

and they also work!, but when you enter the link to complete the challenge the same message appears.

“Note: If you are using Replit, you cannot create a .env file. Instead, use the built-in SECRETS tab to add the variable.”

I used Replit.

Your project link(s)

solution: https://replit.com/@hrendonc/boilerplate-express-2

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36 Edg/95.0.1020.40

Challenge: Use the .env File

Link to the challenge:

You need to check the value of the secret inside of your get so that your API can respond to changes in the value of this variable while running.

Thank you very much for responding.
The change is made:
https://boilerplate-express-2.hrendonc.repl.co/json

but I will change the code, performing the check within the GET