The error message is only shown if your function doesn't return the right value.
In my case, I oriented to just such output 'Bart' for a single name. And I got a valid result.
'Bart'
This comment is hidden because it contains spoiler information about the solution
There are absent submitted solutions in the "Solutions" block of some katas. It is explained (according to the support) by known issue for old kata with many solutions https://github.com/codewars/codewars.com/issues/2263#issuecomment-719997658
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The error message is only shown if your function doesn't return the right value.
In my case, I oriented to just such output
'Bart'for a single name. And I got a valid result.This comment is hidden because it contains spoiler information about the solution
There are absent submitted solutions in the "Solutions" block of some katas.
It is explained (according to the support) by known issue for old kata with many solutions
https://github.com/codewars/codewars.com/issues/2263#issuecomment-719997658