blackhornet My problem is not from previewing it but instead the problem occur whenever I try to test it on a certain device.Example I tried exporting it on a android debug mode and checked the preload sounds the game stop loading on 80% then I try it on a different platform like windows desktop the game loads but after loading the background music seems to be not playing.My simple event is like this(On start of layout >Play"audio").
— I already tried what you suggest but still got the same result.