HTML Audio code stopped playing with custom domain name

I developing a blog on (blogger.com) and this HTML code was working well:

<audio controls>  <source src="horse.mp3" type="audio/mpeg">
Your browser does not support the audio element.</audio>

But when I have bought and added a new domain name (rishacn.com) to my blog 
with the same host (blogger), audio has been stopped playing, I tried with 
different browsers but also doesn't work, while it is working normally when 
I tried it with a new blog with a free domain name (blogger free domain 
name).


Here is my blog which has domain name: rishacn.com/2017/04/audio.html 
<http://www.rishacn.com/2017/04/audio.html>
Although the same code working here (free domain name): 
risha101.blogspot.com.eg/2017/04/audio.html 
How can I fix it?

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