手机端内容页面里出现这个错误是什么意思呢？

VM2156:149 Uncaught TypeError: $(...).fileupload is not a function

    at HTMLDocument.eval (eval at <anonymous> (jquery.min.js:2), <anonymous>:149:24)

    at i (jquery.min.js:2)

    at Object.add [as done] (jquery.min.js:2)

    at n.fn.init.n.fn.ready (jquery.min.js:2)

    at new n.fn.init (jquery.min.js:2)

    at n (jquery.min.js:2)

    at eval (eval at <anonymous> (jquery.min.js:2), <anonymous>:3:1)

    at eval (<anonymous>)

    at jquery.min.js:2

    at Function.globalEval (jquery.min.js:2)

eval @ VM2156:149

i @ jquery.min.js:2

add @ jquery.min.js:2

n.fn.ready @ jquery.min.js:2

n.fn.init @ jquery.min.js:2

n @ jquery.min.js:2

eval @ VM2156:3

(anonymous) @ jquery.min.js:2

globalEval @ jquery.min.js:2

Ha @ jquery.min.js:3

append @ jquery.min.js:3

(anonymous) @ jquery.min.js:3

Y @ jquery.min.js:3

html @ jquery.min.js:3

success @ index.php?s=yiliao&c=show&id=25:296

i @ jquery.min.js:2

fireWith @ jquery.min.js:2

y @ jquery.min.js:4

c @ jquery.min.js:4

XMLHttpRequest.send (async)

send @ jquery.min.js:4

ajax @ jquery.min.js:4

dr_ajax_module_comment_25 @ index.php?s=yiliao&c=show&id=25:292

(anonymous) @ index.php?s=yiliao&c=show&id=25:307