no problem. I have found a few things that need updating for php8 so I have made a few more changes. Just need to test it all then I will put up a new version.

For error reporting you could look in the code if that is where you put it for error_reporting or possible display_errors these are the php commands that set error reporting and determine if they are displayed on the screen or not. If you change the server settings and you used cpanel then look for PHP selector the choose options and untick display_errors

Zen cart is pretty good at loging errors and warnings in the logs folder.