ElevenLabs audio not showing up on desktop

I have added a Elevenlabs component, it works in the Flow editor, but when accessed in the desktop url the audio player is not showing up, see https://plastibot.dilemme-plastique.ch/experience (after selecting the class, 1 minute after the start).
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Dilemme Plastique
Projet pédagogique multimédia et interactif sur les enjeux de la pollution du plastique
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