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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.
Probably you have the same problem as akoli below. When reporting an issue, state the language, be specific about what the problem is, maybe post your code using markdown formatting and marking your post as having spoiler content. Closing.