Hi Nicolas,
Last time I check, Airbnb experiences are no longer available for new hosts, it seems that you are unable to validate your new experience listing due to this limitation. This is likely a result of Airbnb's recent changes or a "purge" of the experience platform. Unfortunately, if you're a new host trying to list an experience, it may not be possible until Airbnb reopens the feature or updates its platform to allow new hosts again.
You may want to stay updated on any announcements from Airbnb about when or if they plan to reopen the Experience feature for new hosts. In the meantime, focusing on hosting stays or other opportunities within Airbnb might be more viable.
I hope this helps.
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