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.
What language were you using? It might be a problem with the Kata itself.
I have the same situation. Additionally everything is working fine when I use another compiler...