Javascript Vline.js给出了一条神秘的错误消息

我正在尝试vline的房间示例，得到一条无法理解的神秘错误消息

请参阅下面的异常堆栈

    vline.js?t=1231:732
Local stream: W91AhWvMK6ohUoNi meeting:108
User came online, starting mediasession with: bakbak:biplav.saraf@gmail.com meeting:123
 [140623 12:31:36.22] [vline.person] Cannot read property 'log' of undefined
TypeError: Cannot read property 'log' of undefined
    at Qh.f (https://static.vline.com/vline.js?t=1231:195:297)
    at oh (https://static.vline.com/vline.js?t=1231:187:418)
    at W.n.dispatchEvent (https://static.vline.com/vline.js?t=1231:186:432)
    at W.n.vj (https://static.vline.com/vline.js?t=1231:194:348)
    at W.n.dispatchEvent (https://static.vline.com/vline.js?t=1231:193:416)
    at Kl (https://static.vline.com/vline.js?t=1231:366:162)
    at W.n.start (https://static.vline.com/vline.js?t=1231:358:142)
    at bm.n.Oe (https://static.vline.com/vline.js?t=1231:374:279)
    at startPeerMediaSession (http://localhost:5000/schedule/meeting:93:26)
    at bm.<anonymous> (http://localhost:5000/schedule/meeting:124:13)
 vline.js?t=1231:132
Be vline.js?t=1231:132
ze.Vs vline.js?t=1231:132
n.log vline.js?t=1231:127
Qh.f vline.js?t=1231:195
oh vline.js?t=1231:187
n.dispatchEvent vline.js?t=1231:186
n.vj vline.js?t=1231:194
n.dispatchEvent vline.js?t=1231:193
Nh vline.js?t=1231:194
n.xn vline.js?t=1231:384
oh vline.js?t=1231:187
n.dispatchEvent vline.js?t=1231:186
n.vj vline.js?t=1231:194
n.vj vline.js?t=1231:201
n.dispatchEvent vline.js?t=1231:193
Nh vline.js?t=1231:194
S vline.js?t=1231:207
ci vline.js?t=1231:206
mi vline.js?t=1231:209
n.kr vline.js?t=1231:439
Fo vline.js?t=1231:471
Go.send vline.js?t=1231:471
(anonymous function) vline.js?t=1231:488
$a.forEach.d vline.js?t=1231:75
sp vline.js?t=1231:488
(anonymous function) vline.js?t=1231:500
xh vline.js?t=1231:189

vline.js？t=1231:732
当地河流：W91AhWvMK6ohUoNi会议：108
用户联机，开始mediasession时使用：bakbak:biplav。saraf@gmail.com会议：123
[140623 12:31:36.22][vline.person]无法读取未定义的属性“log”
TypeError:无法读取未定义的属性“log”
在Qh.f(https://static.vline.com/vline.js?t=1231:195:297)
哦(https://static.vline.com/vline.js?t=1231:187:418)
在W.n.dispatchEvent(https://static.vline.com/vline.js?t=1231:186:432)
在W.n.vj(https://static.vline.com/vline.js?t=1231:194:348)
在W.n.dispatchEvent(https://static.vline.com/vline.js?t=1231:193:416)
吉隆坡(https://static.vline.com/vline.js?t=1231:366:162)
从W.n.开始(https://static.vline.com/vline.js?t=1231:358:142)
在bm.n.Oe(https://static.vline.com/vline.js?t=1231:374:279)
在startPeerMediaSession上(http://localhost:5000/schedule/meeting:93:26)
在bm。(http://localhost:5000/schedule/meeting:124:13)
vline.js？t=1231:132
Be vline.js？t=1231:132
ze.Vs vline.js？t=1231:132
n、 log vline.js？t=1231:127
Qh.f vline.js？t=1231:195
oh vline.js？t=1231:187
n、 dispatchEvent vline.js？t=1231:186
n、 vj vline.js？t=1231:194
n、 dispatchEvent vline.js？t=1231:193
Nh vline.js？t=1231:194
n、 xn vline.js？t=1231:384
oh vline.js？t=1231:187
n、 dispatchEvent vline.js？t=1231:186
n、 vj vline.js？t=1231:194
n、 vj vline.js？t=1231:201
n、 dispatchEvent vline.js？t=1231:193
Nh vline.js？t=1231:194
S vline.js？t=1231:207
ci vline.js？t=1231:206
mi vline.js？t=1231:209
n、 kr vline.js？t=1231:439
Fo vline.js？t=1231:471
Go.send vline.js？t=1231:471
（匿名函数）vline.js？t=1231:488
$a.forEach.d vline.js？t=1231:75
sp vline.js？t=1231:488
（匿名函数）vline.js？t=1231:500
xh vline.js？t=1231:189

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是否可以获取此文件的未统一版本？

在进一步调试时，我发现我使用的是与vline.js冲突的全局变量