LR cc 7.4. I have tried version 7 - 7.4. same issue... LR 5 it works. I have read all kinds of suggestions and none work. Several people say to use LR 5 for slide shows as nothing else works... oh and this is a Mac High Sierra. Looks like the issue has been around since 2016. All MP3s I have tried work in LR5, Premeire Pro, Movie just not in LRcc 7xx. I am paying good money for this monthly can someone help me get this fixed?
Yes I have rebooted then only run LR
uninstalled reinstalled (all 7xx versions, all have the same issue)
I even recorded a voice memo on an iPhone which is a m4a file and it does it on that, so it is not like a copyright thing ...