Imported tracks have no sound or waveforms
New user here. Mixo on Macos and ios. Just upgraded to Mixo Gold and imported a few tracks. The tracks seem to be visually playing but there is no sound or waveforms. On mobile I see the tracks but when I click on them it says: track cannot be streamed. I have set up my dropbox on both devices. The volume control at top right is all the way up. Please assist.