Console in embedded Repl

My embedded Repl used to show a console when run, where a user could set an environment variable. But that doesn’t seem to be the case any more.

The embedded Repl is here:

but the instructions are no longer valid, as there’s no console appearing.

What happened to the console? Is there a way to get it back? Or is there another way for people who don’t have a Replit account to set an environment variable in an embedded Repl to try out the script for themselves?