I am the least-qualified person to reply but what I’ve learnt is that it’s probably too much water, or not enough, or the correct amount but at the wrong depth. Or maybe it’s not enough plant food, or too much, or not enough light (unless it’s had too much but I think I can at least rule that one out). Or perhaps there’s some pest or disease, or the plant’s star sign means it must be aligned/unaligned with the local ley lines. Finally, your plant may dislike your music, or lack thereof.

I hope someone else can help narrow it down further.