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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.
It could be due to Factor on Codewars being on version
0.98, which is massively behind the main Factor dev branch. There is plans to update the Factor version as soon as a new stable version is released, however we have been expecting that release for a really long time and it is still yet to come. But one day, I guess (: