I'm thinking the problem might be that that input given by the test isn't an array as the others

The input is always an array of arrays, and you can see that printing the input.

tito.plauto - did you find the solution of this? Because I currently have the same problem.
The strange thing that when I'm copying this matrix and trying to test it it works, but it fails during the attempts

Good day. The order from 1 to 9 should be horizontal and vertical at the same time. This rule is the main idea of the game. If you look on the first column of your "table", you will see, that all values are equal to '1', instead of being in order from '1' to '9'

You're misreading the logs, that test expects false. Read this: https://docs.codewars.com/training/troubleshooting/#print-input