com_categories - saveOrderAjax() not working

[PStanislav]

Example of request parameters:
{ "order[]": [ "1","9","1","2"] }
{ "cid[]": ["2","8"] }

will never pass:
\count($idArray) == \count($lftArray)

in libraries\src\Table\Nested.php
saveorder($idArray = null, $lftArray = null)

[joomdonation]

Should be fixed by this PR #37781 . You can use the solution here #37778 (comment) while waiting for 4.1.4 release