My username is causing problems when running code/application



My user name ends with an underscore, like username_.
When I run my code, somehow the underscore get stripped from my username & I get response like:

Your code is running at

instead of

When I click the URL, of course I get:

No application seems to be running here!

Because that is someone else’s username.
I tried to manually add an underscore to get the correct username( but I still get “No application running” response. How can I resolve this issue?


I saw somewhere else that there are a few illegal characters in those URLs, and that they are always replaced with -. Maybe try