问语音视频通话web版本，demo放到服务器上不正常运行？

直接本地磁盘打开页面，是可以正常跑通demo的，但是把demo放到apache服务器上，就无法使用了

Uncaught (in promise) TypeError: Cannot read property 'enumerateDevices' of undefined

at trtc.js:1

at S (trtc.js:1)

at Generator._invoke (trtc.js:1)

at Generator.e.<computed> [as next] (trtc.js:1)

at Xe (trtc.js:1)

at a (trtc.js:1)

at trtc.js:1

at new Promise (<anonymous>)

at Object.<anonymous> (trtc.js:1)

at Object.tl.getCameras