It's just the .mp3 files I'm having this issue with. I have some images in my project as well (placed in an assets folder inside the project) and they work without any issues.

Hi, thanks for the reply. I already fixed the issue, but to answer your question: DSWaveform and DSWaveformViews are packages which I am using in my project to generate the waveform images directly from the audio files. Pretty dope :) Here‘s a link if you want to learn more: https://swiftpackageindex.com/dmrschmidt/DSWaveformImage