your code is case-sensitive, as opposed to what the description asks. not a kata issue

fixed by disabling older Node versions

Please reset the trainer to the latest Node version. Not a kata issue though.

No, they're not.

Please provide more context, so far CS, JS, Python and Ruby have no issues ! (Just tested with my code)

We certainly cannot deduce:

1. Programming language in which you're attempting this.
2. What is input ? What is output?
3. Your code(incase you want to post it here, use spoiler flag and use code formatting)

Do you mean that you're not using javascript?
Converting int to bool is typically done by comparing the int to something.