There are a few things that aren't quite right with how this is setup. First, your question about deprecated jQuery. Shortcodes are PHP functions that execute on the server. They are not jQuery. Even if you did run into a deprecated jQuery function, you would see an error in the browser console.

Second, you placed the date_calc shortcode in the CSS Layout Classes area. This field only works correctly with CSS class names. Shortcodes need to placed in the default value field. Try moving it there and test again.

Last, the jQuery error you see has nothing to do with the date field. If you examine the error in the browser's console, the jQuery that is producing the error is:

jQuery(document).ready(function($){

$('#code66').change(function(){

var sourceField = $('#code66').val();

$('#naam65').val(sourceField);

$('#naam65').trigger({ type:'change', originalEvent:'custom' });

});

});

I don't know how you inserted this script, but the opening script tag is at the end of the previous input field. There is also a lot of white space after the script tag. This white space is either confusing wautop or the browser. You need to insert the jQuery correctly without white space after the tags.

Whever I run into problems with jQuery, I directly inject it into the page header with the wp_head() hook. I also use PHP_EOL at the beginning and end of the injected code so the code all appears within its own block. It solves a lot of problems.