no video, no audio track

After the video recording started, click stop button, the problem of no video and no audio track appeared, Error: ** uncaught TypeError: Cannot read propery 'dataEnd' of undefined (EBML.js), at Object.makeMetadataSeekable(EBML.js:952), at FileReader.fileReader.onload(RecordRTC.js:1920) ** Looking forward to your reply, thank you