Hi,

I keep getting an error message when loading tracks from the playlists above the browser ".... could NOT be played due to a missing or corrupt file, unsupported format or DRM-protection"
This isn't happening all the time, because yesterday I loaded the tracks and adjusted the beat grids then locked them with the padlock, but today they won't load. All my tracks are mp3 and all imported from iTunes library on my MBP. Some will load directly from the iTunes library folder but most will not.
Anyone have any idea what's happening here?

Please help.

I didn't find the right solution from the Internet.

References:-
https://bit.ly/2pJDoYk
Marketing video service

Thanks