AlekseyS
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You missed the fact that you need to export the sound at the very least. Select the sound from the complete folder, right-click on your sound, and export it. However, I'm not 100% sure if that will be enough, but you should at least try that.
Added 28 minutes later
I know this message might be off-topic, but who can test my map, which I'm almost finished with (only 2 cutscenes left to complete)? The save files don't work, and there's no way to fix it properly.