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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.
That's not a kata issue. Most likely a problem with the internet connection, your browser or the codewars server.
Could you resolve the issue?
Get unresponsive scrpt error multiple times. Have to stop script and reload page.