Mixvibes Dj Community old forum

Question re Playlists. MixVibes (on Android 9.0) doesn't see my Playlists - whereas VLC sees them perfectly on the phone SD card - correct tracks - correct order etc.. All are stored as .m3u files in the same folder as the music folders. If VLC can see them ok, why can't MixVibes? They are downloaded from the iTunes on my PC via an app called SyncTunes Ultimate. The playlists were created and are maintained on iTunes on the PC. I can also see the playlists (.m3u files) using a File Manager app.