Loading collection data...
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.
The description should be on the line before the "Oups". If you still don't get it, post your solution here, with the "Spoiler"-flag...
Could you post your code with a spoilers tag? It sounds like you have an index wrong somewhere, but I can't really tell without a look at your solution.