My playlists stopped syncing for some reason. When syncing on my computer, it says they got synced, but when I check my phone, they're not there. There's .pla files with the latest time I synced, but they don't appear in my music app. When I try to import them, it says "Failed to import playlist. Error! Cannot read file". It seems to be just playlists. When I add a new song to my library, that gets synced fine.