Website sometimes unable to load. Preload() sound file issue

I’ve made a website with a sketch that utilizes the preload() function to load a sound file. When one visits the website for the first time, it gets stuck loading. If you open the console through developer tools you see the message

p5.sound.min.js:24 Unable to load crash.mp3. The request status was: 206 ()
 The error stack trace includes: 
    at preload (

If you then reload the page, it works fine. How can I have it load correctly the first time?
Here is the website.