Just edit jquery.blockUI.js sudo nano /addons/web/static/lib/jquery.blockUI/jquery.blockUI.js)

remove old expresion line 18 - 21

if ((/1\.(2\.([3-9]|[1-9][0-9])|[3-9]\.[0-9]*|[1-9][0-9]*\.[0-9]*)/.test($.fn.jquery)) === false ) {

alert('blockUI requires jQuery v1.2.3 or later! You are using v' + $.fn.jquery);

return;

}

Thats it :).