"This folder is empty" when trying to open certain folders

Hey, as the title says, I'm getting this problem since like 2 days ago. I'm trying to open my Music folder on my desktop or my whole D drive (with tons of items on it like game installations, music, pictures etc.) but the window that opens is empty and writes in it "This folder is empty". The address bar keeps loading and if I leave it loading (green bar filling), it stops right before the...