attempt to fix error handlers for PHP 8.1

[jpmarcotte]

From https://www.php.net/manual/en/function.set-error-handler.php

Warning This parameter has been DEPRECATED as of PHP 7.2.0, and REMOVED as of PHP 8.0.0. If your function defines this parameter without a default, an error of "too few arguments" will be raised when it is called.

It appears that it's not breaking in 8.0 because the underlying issue that throws to these isn't being triggered, which is a separate Symfony issue. We'll need to upgrade Symfony to a version which supports PHP 8.1 for that. This at least fixes our own issue and allowed us to see the underlying one.

I thought about removing it, but figured we can save that for whatever version requires PHP 8.