one song on an album refuses to sync across devices
It's all in place on the desktop, where the file was originally download (my own creation, using Reaper—mp3s); It appears across my devices and on my laptop, but is greyed out with red-cloud ! symbol instead of to the length. Speaking of which, this is 56 minutes long. Any thoughts on why it won't sync?
I've turned off syncing across devices, turned it back on. No dice.
I'm on High Sierra and iOs 14.4