ok update here: it seems the Plugin Post View Stats causes the conflict with php 8.0. but nevertheless please be sure and check the compatibility also...

hi again, i did not use woocommerce pdf product voucger plugin. the log file i will send later on

Hi @chris, i have a similar problem, but without Woocommerce PDF Voucher Plugin. If i enable PHP 8 it will produce critical error. Can you update this...