Found a malformed link on the create.lds.org music showcase page.
To see it, go to create.lds.org, then 'Music', then 'Music Showcase'. The malformed link is for the clip from 'I Will Arise'. Turns out an extra .mp3 got added to the URL at the very end. Here is the URL without the extra .mp3, it will take you to the correct file as intended.