Looks like you need to update jQuery. You are running
/*! jQuery v1.8.3 jquery.com | jquery.org/license */
and a very quick search of the error message text lead to this, posted five months ago– https://github.com/blueimp/jQuery-File-Upload/issues/1794–, and to the simple instructions “You need to upgrade to jquery-ui 1.9”.
I would suggest updating your install as a whole: http://www.redcoats.co.uk/readme.html
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