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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I got the same error.
When i typed this in solution area and submit: console.log(result); i got this in output area:"ehT kciuq nworb xof spmuj revo eht yzal .god "
Well the original string should be: "The quick brown fox jumps over the lazy dog.", that mean i do the correct answer,
but still error,confusing... so i have to skipped.