Php 8.1 upgrade

i upgraded from 7.4 to 8.1 running 3.0.2

all pages blank it does not render anything even simple text page with no template, backoffice works fine

only error I get is
[2022-12-02 14:16:44] (ERROR @ /XXXX/core/vendor/xpdo/xpdo/src/xPDO/xPDO.php : 666) Could not load class: modFileHandler from modfilehandler

anyone got an idea? I tried to reinstall 3.0.2 twice but same issue

Sorry to make people read my crap

sooo the issue was SEO Suite 3.0.4-beta with php8.1 and modx 3.0.2

Seo suite is not yet 100% working on v3 with php 8.1, I have it running on some sites but on others it bombs out completely