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.
I get the same error and have no clue whats going on
I hadn't notice that you had raised an issue on this. Issues are for problems in the Kata, and your problem is in the code you posted.
If you need assistance with your code, you could simply ask a question without raising an issue.
The two arrays are not necessarily the same length and that's why you are getting this error. I advise you to research this error; you will learn alot.