이벤트 스킨 오류 > 버그 & 건의

jquery.countdown.min.js:22 Uncaught Error: Couldn't cast ` ` to a date object.
    at b (jquery.countdown.min.js:22)
    at j.setFinalDate (jquery.countdown.min.js:22)
    at new j (jquery.countdown.min.js:22)
    at HTMLSpanElement.<anonymous> (jquery.countdown.min.js:22)
    at Function.each (jquery-1.12.4.min.js?ver=191202:2)
    at a.fn.init.each (jquery-1.12.4.min.js?ver=191202:2)
    at a.fn.init.a.fn.countdown (jquery.countdown.min.js:22)
    at HTMLSpanElement.<anonymous> (notice_event:2609)
    at Function.each (jquery-1.12.4.min.js?ver=191202:2)
    at a.fn.init.each (jquery-1.12.4.min.js?ver=191202:2)
b @ jquery.countdown.min.js:22
setFinalDate @ jquery.countdown.min.js:22
j @ jquery.countdown.min.js:22
(anonymous) @ jquery.countdown.min.js:22
each @ jquery-1.12.4.min.js?ver=191202:2
each @ jquery-1.12.4.min.js?ver=191202:2
a.fn.countdown @ jquery.countdown.min.js:22
(anonymous) @ notice_event:2609
each @ jquery-1.12.4.min.js?ver=191202:2
each @ jquery-1.12.4.min.js?ver=191202:2
(anonymous) @ notice_event:2607
i @ jquery-1.12.4.min.js?ver=191202:2
fireWith @ jquery-1.12.4.min.js?ver=191202:2
ready @ jquery-1.12.4.min.js?ver=191202:2
K @ jquery-1.12.4.min.js?ver=191202:2

리스트에 시간 체크 부분이 에러인거같습니다.
<span class="desc-subj">- 상태 :</span><span class="list-countdown" data-countdown="<?php echo $list[$i]['wr_7']; ?> <?php echo $list[$i]['wr_8']; ?>"></span>