new FilesDataset('data/') returns empty

[CodezPoet]

Hi,

I cannot get a result for $dataset. It keeps returning an empty array. Banging my head against the wall trying different solutions. The data is there in plain text, put there by file_put_contents. The data is in data/001.txt. I have tried different subfolder and filename.

Trying to follow the instructions for FilesDataset, and the BBC Text data classification.
Links:
https://php-ml.readthedocs.io/en/latest/machine-learning/datasets/files-dataset/
https://arkadiuszkondas.com/text-data-classification-with-bbc-news-article-dataset/

PHP code is as follows:

`

use Phpml\CrossValidation\StratifiedRandomSplit;
use Phpml\Dataset\FilesDataset;

$dataset = new FilesDataset('data/');

$split = new StratifiedRandomSplit($dataset, 0.2);
$samples = $split->getTrainSamples();

echo $samples[0]; // Mutant book wins Guardian prize ...
`
Any assistance would be great, I can't find any solution for this, and even looking at files and Classes in the app, just cannot figure out what is going wrong. Not getting any errors from PHP.