It was; now it isn’t.
Maybe; we can’t be sure. You can try checking by creating a file with the following code:
<?php
phpinfo();
If visiting it prints PHP information and has PHP 7.4.8, then you’re still on PHP 7.4. If it doesn’t work, you’re on PHP 8.2.
You can assume that it broke because of the update; but this question is suited for the Oxwall forums. We can’t provide assistance for a script we don’t develop.
If you haven’t already, you can try submitting it on https://developers.oxwall.com/forum, although from how I see it riddled with spam, you may just wish to look for another script as I suggested.