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I'm not really a https guru, but it'd certainly help if we knew the exact error that your browser is giving. These are usually in all caps, and would look something like SSL_ERROR_RX_MALFORMED_ALERT. Usually you can find these by clicking "more information" or "Advanced" on the page with the error. Alternatively, use the dev tools to find the error.
That being said, my guess is that since you're running on localhost, that probably indicates you running a self-signed certificate. Has that been properly added to your browser's certificate store?