Audio does not work in the snap version

I am using the snap version of Synfig 1.4.0 on a Ubuntu 20.10 and audio files do not work. (audio files loaded intro the project help me, I like to hear the sound in the prerendering stages, dialog, etc)

If I load the same files into the appimage of Synfig 1.4.0 the audio works. I click play and the animation plays accompanied by the sound file.

The appimage and the snap are the same version, I gave the snap all the permissions … I don’t know what is wrong with it.