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.
Can the issue be closed then?
It wasn't anything on your side, it looks like the reference solution broke due to the leaderboard page's html changing. It should be working now.