Hello,
We have tested the included sample in the DocxUtilities/replaceChartData folder with PHP 5.2, PHP 5.3, PHP 5.5, PHP 5.6, PHP 7.0 and PHP 7.1 on Linux, Windows and macOS and everything is working as expected.
Please extract the package again, and without changing anything, open the examples/DocxUtilities/replaceChartData folder and run the script using PHP CLI mode:
$ php sample_1.php
and check the DOCX output. Also please check the script can write to the target folder.
Do you see any PHP error? Could you post the PHP version you are using?
Regards,