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[Report Only] Refused to frame 'https://docs.google.com/' because an ancestor violates
the following Content Security Policy directive: "frame-ancestors 'none'".
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https://stackoverflow.com/questions/38535491/trying-to-render-iframe-ancestor-violates-the-following-content-security-policy
The frame-ancestors value acts on the source of the iframe not the document framing it.
Setting CSP(Content Security Policy) on your page will have no effect on the framing. 
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