https://github.com/joomla/joomla-cms/blob/4.0-dev/build/media_source/system/js/draggable.es6.js#L59

TypeError: rows.reverse is not a function

      if (dir === 'desc') {
        // Reverse the array
        rows.reverse();
        inputRows.reverse();
      }

@C-Lodder

reverse() requires an array, so it's most likely that wrapper.querySelectorAll('[name="order[]"]') isn't returning anything.

Check the view: https://github.com/joomla/joomla-cms/blob/4.0-dev/administrator/components/com_content/tmpl/articles/default.php#L222

its not returning anything because there is nothing for it to return when there should be

When in descending order, ordering should be disabled. Check Categories.

It is returning a nodelist that reverse cannot be performed on. Sadly, I don't know JavaScript to provide a fix.

NodeList(3)
0: <input class="width-20 text-area-order hidden" type="text" name="order[]" size="5" value="2" data-order="2">​
1: <input class="width-20 text-area-order hidden" type="text" name="order[]" size="5" value="3" data-order="1">​
2: <input class="width-20 text-area-order hidden" type="text" name="order[]" size="5" value="1" data-order="3">

You need to convert the nodelist to an array

[].slice.call(document.querySelectorAll('[name="order[]"]'))

Please test PR #28773.