Trouble with Chrome

Hi,
The iframe don’t open with Chrome (but it’s ok with Firefox, and Explorer). I can see this message in developper tools :
Refused to display ‘https://www.facebook.com/plugins/customer_chat.php?……’ in a frame because an ancestor violates the following Content Security Policy directive: “frame-ancestors https://www.facebook.com”.
The whitelist domain is ok. The app ID is ok, the page ID is ok.
What do you think about this error ? How can I resolve it ?
Thanks

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