You're probably mixing up inputs and outputs of different test cases.
There's a test with Momsie being the input with the expected result false

unpublishing as a duplicate with many long standing issues.

How is "momsie" a palindrome?

The test case is wrong, I guess.

Tests are missing

Oh yeah.. Sorry.

But how should I compare strings? by their length?

Nope, you must've a bug in your code.

The description mentioned that the function should return null when there is not enough elements in the BST. But it raises an error when attempting. (javascript)

Could be, I've only added random ones.

We must have overlapped. I added fixed tests a few minutes ago but I don't see them anymore. Could they have been overwritten in the process?

Well, that doesn't work anymore, I've added random tests for javascript (the author was long gone). And sharing the screenshot of a solution you consider cheating is not a good idea IMHO.

Here is a screenshot to the code, https://pbs.twimg.com/media/EbkQ-V6XQAAtx7R?format=png&name=small

The output is hard-coded.

I'm too low level to see the code. What does it say?

Why do you put two different things under one kata?
And Why are you using your username on class names?

Yeah, the fault is on the author.

this is actually "legit" and the fault is on the author (and that's the very reason we enforce the implementation of random tests, nowadays...)