Try to select explicitly a device in Settings > Audio > Output (going right/left on the setting), one by one. See if with one of them is working
Theoretically the same device currently selected in Kodi is supposed to work.
You may also share your current /storage/.kodi/userdata/guisettings.xml (and advancedsettings.xml if any and if any specific audio setting is there).
Also you may try restoring Kodi audio settings to default if anything specific was changed.