Audio Player plugin – "File not found"

Hey all,

I’m trying to make the Audio Player plugin work on this site – I have it working great on other sites and am not sure why it’s not working.

https://thehomeof.org/holidays-for-the-future-4

You will see that the link links directly to an audio file:
Holidays for the future #4 6_4_11
This is the code: Holidays for the future #4 6_4_11

But the Audio Player plugin to the same folder says “File not found”
This is the code: [audio:https://thehomeof.org/wordpress/wp-content/uploads/2011/05/Holidays-for-the-future-4-6_4_111.mp3|titles=Holidays for the future #4 6_4_11]

It seems right to me! Why is the “File not found?”

Thanks,
Leah