Yes, I have already installed an SSL certificate.
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Next thing to check is that your browser allows self signed certificates. Chrome does not by default: https://stackoverflow.com/questions/7580508/getting-chrome-to-accept-self-signed-localhost-certificate
Hello.
This question is out of scope of this forum. You can find answer on other resources like stackoverflow: https://stackoverflow.com/questions/10175812/how-to-create-a-self-signed-certificate-with-openssl