У вашего броузера проблема в совместимости с HTML5
*UPDATE*
Another solution I have found is to replace the HDMI cable from your graphics card to the breakout box.
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If you own a Vive headset, no doubt at some point you've encountered either Error 108 or Error 208 (headset not found).
I played around for an hour or so today and discovered this solution. I tried and tested it around ten or twelve times and it has corrected it every time.
Hopefully it can help you if you're having this issue!
Cheers!