The issue is that you didn’t actually create an env file.
When I look at your link I see this.
It should be .env.
not comma env.
But in replit you can’t create an env file by doing .env anymore.
They changed it about a month ago.
There is a secrets tab where you can add the key and value.
Click on the lock icon and add the key value and click add new secret.
The Key would be MESSAGE_STYLE
The value would be uppercase