Failed to set Referrer Policy

Hi. I am getting this error in console
Failed to set referrer policy: The value ” is not one of ‘no-referrer’, ‘no-referrer-when-downgrade’, ‘origin’, ‘origin-when-cross-origin’, ‘same-origin’, ‘strict-origin’, ‘strict-origin-when-cross-origin’, or ‘unsafe-url’. The referrer policy has been left unchanged.
Previously, I had set no-referrer-when-downgrade but still got the same error.

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