MyBB Community Forums

Heya Guys!
I have a doubt I have working dvz shoutbox but suddenly it stopped working up.Whenever I enter up any message it shows up nothing except /? in url.
What could be the reason of such behaviour.
On console it shows out some error like this -:

Uncaught TypeError: $(...).on is not a function

    at dvz_shoutbox.js:595

and Line no. 595 Code start from here the starting line is 595 -:

$('#shoutbox').on('click', '.entry .mod.edit', function() {
    dvz_shoutbox.edit( $(this).parents('.entry').attr('data-id') );
    return false;
});
$('#shoutbox').on('mousedown', '.entry[data-mod] .text', function() {
    dvz_shoutbox.holdTimeout = setTimeout($.proxy(function() {
        dvz_shoutbox.edit( $(this).parents('.entry').attr('data-id') );
    }, this), 500);

}).bind('mouseup mouseleave mousemove', function() {
    clearTimeout(dvz_shoutbox.holdTimeout);
});
$('#shoutbox').on('click', '.entry .mod.del', function(e) {
    dvz_shoutbox.delete( $(this).parents('.entry').attr('data-id'), e.shiftKey );
    return false;
});
$('#shoutbox').on('submit', '.panel form', function() {
    dvz_shoutbox.shout();
    return false;
});

Please help me with some possible causes.I have read some threads on the same but nothing good found soo far.
Thanks in advance.

Any help on this??

It may be caused by an outdated jQuery version (usually attached to outdated themes). Does it work on MyBB's default theme?