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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.
Faced the same problem as @sandyjoshi.
I wonder if there are really time-consuming tests with implicit time limit, or it's temp issue with servers.