ReferenceError: aspjQuery is not defined

Hello

I have a little issue when i check with firebug, i receive this warning

ReferenceError: aspjQuery is not defined

setInterval(function(){preCache();},15000);});})(aspjQuery);</script> <div

From this script

<script>(function($){$(document).ready(function(){function preCache(){var data={action:’ajaxsearchpro_precache’};$.post(ajaxsearchpro.ajaxurl,data,function(response){console.log(response);},”json”);}
preCache()
setInterval(function(){preCache();},15000);});})(aspjQuery);</script>

I use already a cache system plugin call wp-rocket

Do you have an idea how i can ride of this ?

Many Thanks
Richard