Nullable types must be explicit

Thanks for working on this, tagging with PHP 8.4, to easier follow along.

If you would have followed the rules to add a PR on our github repro where the full test suite runs, you would have noticed that some fixes are in the code already.

The "rules" are two scrolls away from the top of the project homepage, with no formatting that highlights them, and it's a pity that the git repos are not synced.

The problem is that I can't get the tests to work on gitlab. I asked for help, but obviously the interest isn't that high.

Automatically closed - issue fixed for 2 weeks with no activity.