Codeigniter 3.2.0 problem with php 8.2

I see that I am on CI 3.2.0. All these files are in the "application/errors" folder by default, which by the way has no nested html folder. Should I now shift the entire folder into the views folder?

There is no "application/errors" in "pocketarc/codeigniter", either.
See https://github.com/pocketarc/codeigniter...pplication
https://github.com/pocketarc/codeigniter...ews/errors

If you took over an old CI3 project, it may not be a pure CI3, but a customized CI3.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Maybe your project was using CI2?
In CI3, the error template files were moved from "application/errors" to ""application/views/errors".
See https://codeigniter.com/userguide3/insta...-templates

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper