Mobile Display Issues Frontend

Hello everybody!
First of all I have to say that AudioIgniter is a very well designed Audioplayer and I love to use that tool on our musicproducer website. We use the Player to display some of our works. Yesterday I put in the Tracks and it works very well on my Desktop-PC and Laptop Mac. Even in the mobile-developer Menu of Chrome on my Mac everything works fine, but when i open the page on my iOS iPhone XR I only get a blank player with no chance to play any track.

Could you explain, what did I wrong here?
The password for my Link is: LUF

I use Semplice a theme for wordpress I bought some time ago.
Thank you very much and big probs to everybody at audioigniter

The page I need help with: [log in to see the link]