Joomla PHP 8.2 compatibility

There seems to be a problem with joomla and more recent php versions. Some extensions that the recent versions enable or introduce don’t agree with either Joomla or some of its themes or extensions. Disabling the PSR extension for PHP 8.2 and PHP 8.3, and replacing the nd_mysqli module with the mysqli module seems to have fixed the issue. I have no idea what these extensions do, but it all seems to still work anyway.