Unexpected error related to challenges #18
Description
when taking challenges and i had failed the test, after I deleted my original code, then open it again.
every time it would show the error message and I can't re-take the challenge.
the website would be https://onecompiler.com/challenges/3w8xvfbtb/strings-challenge.
don't know whether the above is enough.
comment if you need more
warm regards.