I have a strange issue and as far as I can see it is down to INTEL vs SILICON. I am running MiX16 PRO on my desktop (M3 Ultra Desktop), creating the playlist etc and all is fine. The files are stored in dropbox folder on the machine. I have also tested with files in another area and am confident that the file path for the audio files is the same.

However if I open the file on my laptop (i9 MBP), where the files appear to be in the same location (both the mix16pro file and the audio files),