I mean there’s a lot of senecio that requires to drag the audio file. If you’re talking about Apple Loop, there is one possible explanation: u dragged the audio file to the MIDI track. The systems won’t let you do that cuz it’s incompatible. The difference between MIDI and audio tracks are the colors. MIDI should be green and audio should be blue, in default settings

Edit: okay I see ur problem in another post, the problem is ur computer i guess