Jenkins Cross-Origin-Opener-Policy header has been ignored

As I was following through the tutorial for Jenkin’s Installation (, I successfully installed Jenkins.

But when I access Jenkin’s login page, I’m getting an ‘The Cross-Origin-Opener-Policy header has been ignored, because the URL’s origin was untrustworthy. It was defined either in the final response or a redirect. Please deliver the response using the HTTPS protocol. You can also use the ‘localhost’ origin instead. See and

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