Iframe player not loading in Chrome incognito mode

Hey

I have an error message im my browser when going to our website which has the embedded player on it

Chrome Version 112.0.5615.138

The error only seems to happen in incognito mode - tried different profiles, works everywhere else. Also no problems in Edge. 

You can see it live here https://www.luna-park.de/event/webinar-alternativen-zu-google-analytics/

Anyone had this before?

Thanks