It appears that uploading music to the site is not a problem. However general “Public playback” is.
After one uploads a song to the site, the song will playback fine from under the “Your Profile” area, but not from the general public area.
We are working to figure out what is going on with that, now that I’m back in the saddle again.
Sorry about the delays and hopefully I will continue to be able to work on things again.