You cannot left empty fields marked with 'required'

WordPress version: 3.6
Plugin version: 2.3
Link to my site: http://z808.imtcollege.com

I expected the plugin to do this: to just play my mp3 list on my 2 thank you pages.

Instead it did this: Why is it required to add an ogg file?

Here’s what I’ve tried so far: I have no idea what to do next.

All I want is to play mp3 files and not OGG. Is this possible with this player? Thanks.

http://ww.wp.xz.cn/plugins/html5-jquery-audio-player/