Unable to listen an audio in chrome

I have been using chrome browser for html5 output of my articulate-2 file, but now I am facing some issues regarding audio, I am unable to listen audio of my first slide in chrome, I have the latest version of chrome(67), my course works perfectly in other browsers, I also tried to run course in the previous version of chrome(58) it works fine, I have made hundreds of course and its works fine in other browser and previous version of chrome but only latest chrome browser is unable to run it perfectly. I am stucked there. please give me any suggestion.

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